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STC Closure, Fiber Access Terminal (FAT) TS-3440

1. GENERAL

1.1 Scope

This specification covers the minimum standards and requirements for the construc ion, properties, testing and packing of the outdoor closure, Fiber Access Ter inal (FAT) and its accessories, to be supplied to Saudi Telecom Company (STC).

1.2 Intended Use

1.2.1 The FAT closure shall be used to enclose and protect fiber spl ces, optical splitter unit, as well as to distribute and connect the exchange side fiber optic cables to the end customers.

1.2.2 The FAT without built-in splitter shall be designed with ports to accommodate (at minimum) 1 uncut cable, 3 standard cables and 24 outgoing drop cables.

1.2.3 The FAT with built-in splitter shall be designed with ports to accommodate (at mi cable, 3 standard cables and 32 outgoing drop cables.

1.2.4 The FAT shall be used as an interfacing point be ween distribution cables and drop cables, with additional function of housing the bypassing fibers from incoming cable to the next FAT.

1.2.5 The FATs with built-in optica splitters, shall be available with any of the following splitter units; 16 units of 1:2, 8 units of 1:4, 4 units of 1:8, 2 units of 1:16 or 1 units of 1:32 splitters.

1.3 Long Term Performance Requirements

1.3.1 The FAT closure supplied in compliance with this specification shall be capable of withstanding the typical service conditions of the Kingdom of Saudi Arabia for a period of thirty (30) years without detriment to the transmission or operation and maintenance characteristics of the product.

1.3.2 The FAT closure shall be designed, manufactured and packaged so that the physical, transmission and operation and maintenance characteristics shall not degrade when exposed to the environmental conditions of Saudi Arabia and the expected environmetal conditions during storage and transportation outside of the Kingdom. The environmental conditions of Saudi Arabia may include ambient air temperature variations from -10°C to +55°C. In addition, direct solar radiation is known to increase the temperature to approximately 70°C.

1.4 Reserved Right

1.4.1 The Saudi Telecom Company (STC) reserves the rights to make changes to this Specification without prior notice.

1.4.2 The Saudi Telecom Company (STC) cannot guarantee if any of the standards and requirements of this specification is not covered o protected by copyright or patent of a third party.

1.5 Associated Specifications

1.5.1 The following mentioned international and national standards shall be applied, and deemed to be an integral part of this specification:

TS 2111

STC Technical Specification for Cables, Fiber Optic, Single Mode (SM), Standard Type.

TS 2115

STC Technical Specification for Fiber Optic Cables, Single Mode (SM), Mini Type, Outdoor (Central Tube Design)

TS 2116

STC Technical Specification for Cables Type, (Outdoor) Fiber Optic, Single Mode (SM), Mini Type, (Outdoor)

TS 3303

STC Technical Specification for Fiber Optic Splitter.

ASTM D 1603

Standard Test Method for Carbon Black in Olefin Plastics.

ASTM D 1693

Standard Test Method for Environmental Stress Cracking of Ethylene Plastics.

DIN 53495

Testing of Plastics; Determination of Water Absorption.

IEC 60068-2-6

Environmental Testing Test: Part 2 - Tests Fc and Guidance: Vibration (sinusoidal)

ISO 175

Plastics; Determination of the Effects of Liquid Chemicals, Including Water.

ISO 846

Plastics - Determination of Behavior Under the Action of Fungi and Bacteria. Evaluation by Visual Examination or Measurement of Change in Mass or Physical Properties.

ISO 868

Plastics and Ebonite - Determination of Indentation Hardness by Means of a Durometer (Shore Hardness).

ISO 1133

Determination of the Melt Flow Rate of Thermoplastics

ISO 1431

Rubber Vulcanized or Thermoplastic - Resistance to Ozone Cracking.

ISO 1653

Vulcanized Rubbers - Determination of Compression Set Under Constant Deflection at Low Temperatures.

ISO 4587

Adhesives - Determination of the Tensile Lap-Shear Strength of High Strength Adhesive Bonds.

DIN VDE 0303

Test Methods for DC Resistance or Conductance of Insulating Materials.

EN 60529

Degrees of Protection Provided by Enclosures (IP Code)

ETS 300 019

Environmental Conditions and Environmental Tests for Telecommunications Equipment

UL 94

Tests of Flammability of Plastic Materials for Parts in Devices and Appliances

ISO 9001:2008

Quality Management Systems – Standardized Requirements.

ISO 9002

Quality Systems - Model for Quality Assurance in Production and Installation.

1.6 Definitions and Abbreviations

1.6.1 Definitions

Fiber Closure

An enclosure used to provide mechanical and environmental protection to jointed fibers of the optical cables

Dome Type Configuration

A type of connection wherein cables enter and exit in only one end of the closure normally a rectangular or round shaped canister.

Splice Tray

A tray, cassette or similar system designed to neatly contain fiber splices and spare fiber lengths for possible future splicing requirements.

Splitter Tray

A tray, cassette or similar system designed to neatly contain optical splitter units and spare fiber lengths for wiring requirement to the input and output splicing tray.

Strength Member

The component of assembled cable, which is designed to withstand all forces to which the cable is likely to be subjected.

Splice Holder

A plastic holder with grooves, used to secure the fusion or mechanical splice protection sleeves
inside the splice tray. Each holder normally contains up to six heat-shrink splice protectors.

1.6.2 Abbreviations

ASTM

American Society for Testing and Materials.

IEC

International Electrotechnical Commission.

ITU-T

International Telecommunications Union (Telecommunications Sector)

ISO

International Standards Organization

UL

Underwriters Laboratories

2. TECHNICAL  REQUIREMENTS

2.1 General

2.1.1 FAT closure shall be compatible with current STC installation standards and operation and maintenance practices.

2.1.2 Any alternative proposals for Type and Acceptance Testing will be subject to technical evaluation by the STC with regards to satisfactory compliance with the material and product qualities implied by this specification.

2.1.3 FAT closure shall completely restore the sheath integrity of the cables. It shall provide a hermetically sealed interior environment a d secured storage for the spliced and excess fibers.

2.1.4 FAT closure shall include all necessary parts to complet the joint. This shall comprise all components to protect and store the spliced fibers, organize and store the excess and uncut fibers, provide sheath continuity, anchor the strength member, and secure the cable sheaths.

2.1.5 FAT closure and its components shall be made of non-corrosive, metallic or non-metallic materials.

2.1.6 All external plastics and sealing materials shall be inhibited against ultraviolet degradation and shall be resistant to petroleum distillates, soil fungi and micro-organisms.

2.1.7 All metal welds and plastic moulds shall be of high standard wrkmanship. In accordance with ASTM E 390, neither ungraded defects nor graded defects greater than grade 1 shall be permitted.

2.1.8 FAT closure shall be of high quality design, workmanship and finish. All components of the closure shall be free of pinholes, cracks, sharp edges or o her defects, which may detract from the service requirements of the closure.

2.1.9 FAT closure shall be designed with facility for uncut cable and storage for the uncut loose tubes.

2.1.10 Installation, opening and closing of the closure shall only require simple hand tools. The design of  the closure shall be such that one skilled technician can safely manage its installation.

2.1.11 FAT closure shall be re-enterable several times without damaging the housing (shell). Removal of the closure

shell shall not disturb the integrity of the spliced fibers, excess and uncut fibers, and bonding/earthing arrangement.

2.1.12 The humidity inside FAT closure shall not exceed 75% relative humidity within the expected lifetime of thirty years.

2.1.13 The components of FAT closure and its accessories shall not contain any hazardous or toxic materials.

2.1.14 FAT shall be protected to IP 68 (Protection against dust and water ingress).

2.2 Design Requirements

FAT closure shall be designed according to the requirements specified as below.

2.2.1 Closure Shell & End Caps

2.2.1.1 Material

Non-metallic materials as Polypropylene or equivalent material, conforming to the properties and test requirements of clause 2.3.1.

2.2.1.2 Closure Design

Dome Type Closure, black in color

2.2.1.3 Outside dimensions (mm), Max

450 x 280 x 150 (HxWxD) for Square Dome; 220mm in Diameter for Round Dome with same height.

2.2.1.4 Shell Construction

  • Shall be single-ended consisting of a base and dome and sea ed with a clamp, or an O-ring system or any equivalent sealing system.
  • Shall have suitable space for splice trays and the storage of excess and uncut loose buffer tubes.
  • Although mechanical type seal is acceptable, heat-shrink sealing type shall be the preferred method used to close and seal the ccupied cable ports
  • End caps shall be provided with a feed-through to allow for external grounding and or inserting a valve for flash testing.

2.2.1.5 Cable Entry Ports

The base or end caps of FAT shall have cable entry ports of pre-drilled holes or knockout inserts or protruding tubes with the following features:

FAT without splitter:

  • 1 port for uncut main cable with outside diameter (OD) from 10 to 17.5mm.
  • 3 ports for main cables with OD from 10 to 17.5mm
  • 24 ports for Drop cables with OD up to 7mm.

FAT with built-in splitter:

  • 1 port for uncut main cable with outside diameter (OD) from 10 to 17.5mm.
  • 3 ports for main cables with OD from 10 to 17.5mm
  • 32 ports for Drop cables with OD up to 7mm.

2.2.1.6 Manufacture logo

Molded on the outside surface of cover or shell.

2.2.2 Splice Tray

2.2.2.1 Material

High-quality plastic.

2.2.2.2 Number of Splice Trays & Capacity

96 splice capacity: Four trays for FAT (with or without Built-in Splitter), with 24 splices (maximum) per tray.

144 splice capacity: Six trays for an extra capacity FAT, with 24 plices (maximum) per tray.

2.2.2.3 Length of coiled fiber inside tray

1200 mm, minimum, each primary coated fiber.

2.2.2.4 Fiber bending radius inside tray

30mm, minimum

2.2.2.5 Assembly

  • Trays shall be equipped with suitable fiber holders and strain relief mechanism to secur the fibers.
  • Each tray shall be equipped with a removable plastic cover

2.2.2.6 Splice holder

Trays shall be equipped with snap-on type splice holders that can hold effectively 40 or 60mm long splice protection sleeves. Each holder slot shall be dedicated to hold and secure one splice sleeve.

2.2.2.7 Splice tray support or bracket

A hinged-type tray support shall hold and secure a multiple tray assembly such that each tray can be hinge-clipped or removed easily for off-closure splicing without the need to remove other trays out ofthe tray support.

2.2.3 Splitter Tray

FAT with  Built-in Splitter  Unit  shall be supplied with one customized tray to house the splitter unit.

2.2.3.1 Material

High-quality plastic.

2.2.3.2 Splitter Tray capacity

Depending on the splitter type, each tray shall be provided with and able to accommodate:

  • 16 x 1:2 Splitter units.
  • 8 x 1:4 Splitter units
  • 4 x 1:8 Splitter units.
  • 2 x 1:16 Splitters
  • 1 x 1:32 Splitters

2.2.3.3 Length of pigtails inside tray

600mm,  minimum,  (un-terminated splitter 0.9mm diameter pigtails).

2.2.3.4 Fiber bending radius inside tray

30 mm , minimum

2.2.3.5 Assembly

  • Splitter tray shall be eq ipped  with fiber  holders  an strain relief mechanism to secur the pigtails.
  • Each tray shall be equipped with a removable plastic cover
  • Each tray shall be pre-installed with the quantity of splitter units in accordance with  Clause  (2.2.3.2) for the FAT built-in splitter type

2.2.3.6 Splitter Unit

Splitter unit as specified by TS 3303 but  with  un-terminated  input  and  output pigtails (without connectors).

2.2.3.7 Splitter Unit holder

Trays shall be equipped with snap-on t pe holders for splitter unit or screw-on type for encased splitter module.

2.2.3.8 Splitter tray support or bracket

A hinged-type tray support similar to that of Splice tray as mentione in Clause (2.2.2.7).

2.2.4 Cable Clamp Hardware

2.2.4.1 Type

Closures shall be equipped with cable’s strength member terminals and cable sheath clamps of eachindividual cable can be attached and secured.

2.2.5 Sealing System

2.2.5.1 Material

Sealing materials, such as heat-shrink sleeves, rubber gaskets or other suitable sealing materials shall conform to the requirements of Clauses 2.3.2, 2.3.3, and 2.3.4.

2.2.5.2 Application

The sealing system or materials shall adequately sealcable and all mating parts, i.e., between closure  shells or between closure shell and end cap/base.

2.2.6 Mounting Kit

2.2.6.1 Application

Mounting kit shall be designed for wall mounting of the dome type closures.

The closures shall be able to be easily removable from the mounting kit for additional splicing and maintenance work.

2.2.7 FAT Closure Accessories

2.2.7.1 Splice protection sleeve

  • Type: Heat-shrinkable sleeve, for fusion splice
  • Length: 40mm or 60mm
  • Assembly: Shall compose of stainless steel needle, hot-melt adhesive tube, and a cross-linked polyethylene heat- shrinkable tube.

2.2.7.2 Protective Tube Set

Application: For routing and protecting fibers and loose tubes.

2.3 Material Properties and Test Requirements

FAT Closure shall meet all the material properties and test requirements as specified as below. The requirements of this section refer to completed product, or material removed from completed product, unless specifically identified otherwise:

2.3.1 Plastic Materials

2.3.1.1 Tensile Strength

  • Requirements: 25Mpa
  • Test Method: ISO 527. Specimen cut from freely recovered material with die #4. Jaw separation rate: 50 mm/min.

2.3.1.2 Ultimate Elongation

  • Requirements: 500 %
  • Test Method: ISO 527.

2.3.1.3 Tensile Strength of Thermal Aging

  • Requirements: 14 MPa
  • Test Method: ISO 527.Specimens conditioned for 168 hrs at 150°C±2 circulating air oven; air velocity 30-60 m/min.

2.3.1.4 Elongation of Thermal Aging

  • Requirements: 300 %
  • Test Method: ISO 527.Specimens conditioned for 168 hrs at 150°C±2 circulating air oven; air velocity 30-60 m/min.

2.3.1.5 Tensile Strength of Soil Chemical Resistance

  • Requirements: 14 MPa
  • Test Method: ISO 527.Specimens conditioned in  the ff. test solutions for 24 hrs at 23°C ±2: Na2SO4, NaOH, H2SO4, NaC1, Oil (ASTM D471), Gasoline (ISO 1817)

2.3.1.6 Elongation of Soil Chemical Resistance

  • Requirements: 300 %
  • Test Method: ISO 527.Specimens conditioned in  the ff. test solutions for 24 hrs at 23°C ±2: Na2SO4, NaOH, H2SO4, NaC1, Oil (ASTM D471), Gasoline (ISO 1817)

2.3.1.7 Water Absorption

  • Requirements: 0.1 %, maximum
  • Test Method: DIN 53495, Method C.Immersion for 24 hrs at 23°C ±2

2.3.1.8 Fungus Resistance

  • Requirements: Pass rating 1
  • Test Method: ISO 846, Method A.Incubation: 30°C, RH >90%, for 4 weeks

2.3.1.9 Environmental Stress Cracking

  • Requirements: No cracking
  • Test Method: ASTM D 1693.Init ator: 10% Igepal CO-630. Immersion for 30 days at 50°C ±2.

2.3.1.10 Carbon Black Content

  • Requirements: 2.5% ±0.5
  • Test Method: ASTM D 1603

2.3.2 Heat-shrink Material

2.3.2.1 Tensile Strength

  • Requirements: 20 MPa
  • Test Method: ISO 527, Specimen cut from freely recovered material with die  #4.   Jaw separation rate: 50 mm/min.

2.3.2.2 Ultimate Elongation

  • Requirements: 500 %
  • Test Method: ISO 527

2.3.2.3 Tensile Strength of Thermal Aging

  • Requirements: 18 MPa
  • Test Method: ISO 527.Specimens conditioned for 168 hrs at 150°C±2 circulating air oven; air velocity 30-60 m/min.

2.3.2.4 Elongation of Thermal Aging

  • Requirements: 450 %
  • Test Method: ISO 527.Specimens conditioned for 168 hrs at 150°C±2 circulating air oven; air velocity 30-60 m/min.

2.3.2.5 Tensile Strength of Soil Chemical Resistance

  • Requirements: 15 MPa
  • Test Method: ISO 527.Specimens conditioned for 168 hrs at 150°C±2 circulating air oven; air velocity 30-60 m/min.

2.3.2.6 Elongation of Soil Chemical Resistance

  • Requirements: 400 %
  • Test Method: ISO 527.Specimens conditioned for 168 hrs at 150°C±2 circulating air oven; air velocity 30-60 m/min.

2.3.2.7 Water Absorption

  • Requirements: 0.1 %, maximum
  • Test Method: ISO62

2.3.2.8 Fungus Resistance

  • Requirements: Class 1
  • Test Method: Incubation: 30°C, RH >90%, for 4 weeks Immersion for 24 hrs at 23°C ±2. ISO 846, Method A.

2.3.2.9 Environmental Stress Cracking

  • Requirements: No cracking
  • Test Method: ASTM D 1693. Initiator: 10% Igepal CO-630.Immersion for 30 days at 50°C ±2.

2.3.2.10 Corrosive Effect

  • Requirements: No Corrosion
  • Test Method: ASTM D 543, Method A, 16 hrs at 120°C, 25 x 6 mm samples

2.3.3 Heat-shrink Adhesive

2.3.3.1 Peel Strength to Heat- shrink

  • Requirements: 100 N/25 m
  • Test Method: Rolling Cylinder Method

2.3.3.2 Water Absorption

  • Requirements: 0.1%, maximum
  • Test Method: ISO 62-A: Immersion for 24 hrs at 23°C±2

2.3.3.3 Fungus Resistance

  • Requirements: Class 1
  • Test Method: ISO 846, Method A, Incubation: 30°C, RH >90%, for 4 weeks

2.3.4 Rubber Material

2.3.4.1 Critical Elongation of Ozone Test

  • Requirements: 40%, minimum
  • Test Method: ISO 1431, Duration: 96 hrs @ 30°C, Ozone content: 50 pphm

2.3.4.2 Permanent Deformation of Tightness Test:

  • 30%, maximum
  • Test Method: ISO 1653 Duration: 24 hrs @ -10°C

2.3.5 Test of Assemble FAT Closure

Preparation of specimens:

Two cables each of minimum and maximum diameters shall be installed in the clo ure according to the manufacturer's instr ctions. Th  cables shall withstand a tensile force of 1kN without deformation. The minimum length of  able external to the closure shall  be 1.5 m. The cable end shall be airtight. Fi ers shall bearranged as in a finished installation.

2.3.5.1 Tightness Test

  • Requirements: No leakage
  • Test Method: IEC 60068-2-17 Q, Sample shall be pressurized to  40kPa and immersed in a water ath at 23°C ±2for 15 minutes

2.3.5.2 Temperature Cycling

  • Requirements: No leakage
  • Test Method: Sample to be subjected to 20 continuous test cycles
    • -20°C for 4 hours
    • -20 to +80°C, 2 hour transition
    • +80°C for 4 hours
    • +80 to -20°C, 2 hour transition
  • Sample shall be subjected to Tightness Test of 2.3.5.1

2.3.5.3 Cold Test

  • Requirements: No leakage
  • Test Method: Sample to be subjected to 10 continuous test cycles:
    • +23°C for 24 hours
    • +23°C to -10°C, 12 hour transition
    • -10°C for 24 hours
    • -10 to +23°C, 12 hour transition
  • Sample shall be subjected to Tightness Test of 2.3.5.1

2.3.5.4 Impact Test

  • Requirements: No leakage and free from cracks
  • Test Method: 0.5kg stell ball shall be dropped freely and vertically from a height of 1m onto the center at the apex of the shell, at 0°C and 45°C
  • Sample shall be subjected to Tightness Test of 2.3.5.1

2.3.5.5 Axial Pull-Out Test

  • Requirements: No leakage
  • Test Method: A load of 1kN shall be applied to each cable in the longtidinal axis of the cable for 8 hours
  • Sample shall be subjected to Tightness Test of 2.3.5.1

2.3.5.6 Compression Test

  • Requirements: No leakage
  • Test Method: A compressive force shall be applied in the axial direction of each cable for a perios of 8 hous.
  • Sample shall be subjected to Tightness Test of 2.3.5.1

2.3.5.7 Statci Load Test

  • Requirements: No leakage
  • Test Method: A compressive load of 1kN shall be applied to the center of the upper part of the shell for 15 minutes. The force shall be applied by a suitable die with surface area of 25c㎡
  • Remove load after 15 minutes and re-applied on opposite face for 15 minutes.
  • Sample shall be subjected to Tightness Test of 2.3.5.1

2.3.5.8 Bending Test

  • Requirements: No leakage
  • Test Method: Sample shall be rigidly mounted on horizontal position. A force shall be applied to one of the ca les at a point 250mm from the end of case assembly with a mandrel  of  10  mm  radius  to  def ect the cables through a minimum angle of 45° in the vertical position. The cable shall be held in the deflected position for a period of 5 minutes, returned to the normal position, and then deflected 45° in the opposite direction. The above cycle shall be repeated 5 times for each cable.
  • Sample shall be subjected to Tightness Test of 2.3.5.1

2.3.5.9 Torsion Test

  • Requirements: No leakage
  • Test Method: Sample shall be rigidly mounted in a horizontal position. The cables shall be rotated about  their  longitudinal  axis thr ugh a minimum angle of 90° at a distance equivalent to 20 times  the cable outside diameter, from the end of the splice case. The twisted cable shall be maintained in this position for a period of 5 minutes, after which the cable shall be returned to its initial position. The cable shall then berotated 90° in the opposite direction, retained in that position for an additional 5 minutes and again returned to i s original position.
  • The procedure shall be repeated twice with each cable protruding from the splice case. The torque applied should not exceed 50 Nm.
  • Sample shall be subjected to Tightness Test of 2.3.5.1

2.3.5.10 Vibration Test

  • Requirements: No leakage
  • Test Method: IEC 60068-2-6. The cables connected to the sample shall be rigidly clamped 500 mm from the closure.  The closure shall be vibrated at a frequency of 10 Hz and amplitude of 3 mm for a period 72  hours
  • Sample shall be subjected to Tightness Test of 2.3.5.1

2.3.5.11 Water Permeation Test

  • Requirements: The measured water permeation rate shall not exceed 50 and 80µg/hr for all closure types
  • The sample shall be assembled as described in clause 2.3.5. In addition, a fitting for the introduction and removal of the carrier gas shall be installed.
  • The sample shall be placed in water at 15°C and nitrogen (suitably dried to give a steady moisture content reading) shall be passed through the sample and at a constant rate between 20 - 50 ml/min. The exiting gas shall be monitored by a coulometric hygrometer. The test shallbe continued for 20 days.

2.3.5.12 Environmental Stress Cracking

  • Requirements: No leakage
  • The specimen shall be immersed in a 10% Igepal solution for 165 hours at 50°C ±2.

3. OTHE R REQUIREMENTS

3.1 Packing

3.1.1 Each FAT closure, with its installation instruction as mentioned in Clause 3.1.5, shall be packed such that all components for a complete unit meet the installation requirements.

3.1.2 All the components/parts for the FAT closure as described in this specification shall be provided as a complete assembly and as one packaged unit.

3.1.3 The FAT closure and its accessories, including mounting kits, shall be covered with a protective material to prevent scratching or damage during shipping or storage, prior to placing the items into the packing carton.

3.1.4 The individual FAT closure package may be multi-packed in strong, weather resistant carton boxes suitable for shipping, handlin and storage.

3.1.5 Each unit of FAT closure shall be supplied with complete installation instructions, in English and Arabic, for the assembly of parts, the mounting methods, and the installation, routing of fibers.

3.2 Marking

3.2.1 Each individual crate and carton shall be marked in legible color with the following information, in Arabic and English, on at least two sides of the package and the carton box.

  • Saudi Telecom Company (STC), Saudi Arabia.
  • Name of the item (according to section 3.3).
  • MIC Number (according to section 3.3).
  • Country of Origin.
  • Manufacturer's Name or Trademark.
  • Month and Year of Manufacture

3.3 STC Standard Edit Name and Mic. Numbers

  1. Closure, Fiber Access Terminal (FAT), Outdoor, 24 Cables, 96 Fibers - 3127028
  2. Closure, Fiber Access Terminal (FAT), Outdoor, 24 Cables, 144 Fibers - 3147097
  3. Closure, Fiber Access Terminal (FAT), Outdoor, Built-in 1:2 Splitter - 3147089
  4. Closure, Fiber Access Terminal (FAT), Outdoor, Built-in 1:4 Splitter - 3147090
  5. Closure, Fiber Access Terminal (FAT), Outdoor, Built-in 1:8 Splitter - 3147091
  6. Closure, Fiber Access Terminal (FAT), Outdoor, Built-in 1:16 Splitter - 3147092
  7. Closure, Fiber Access Terminal (FAT), Outdoor, Built-in 1:32 Splitter - 3147093

Contact us

  • 4th Floor, A3 Building, HuaFeng Industrial Park, GuanTian Village, BeiHuan Road, ShiYan Street, Bao An District, Shenzhen City, Guangdong Province, China
  • +86-755-61350817
  • +86-755-61350817
  • sales@telhua.com
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