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GB/T 28511.1-2012
Integrated optical path devices based on planar lightwave circuit - Part 1：Optical power splitter based on PLC technology
GB/T 28509-2012
Ultrafine coaxial cables with insulation diameter below 1mm and cable assemblies
GB/T 28504.1-2012
Rare earth doped optical fibre - Part 1: Characteristics of double-cladding ytterbium-doped optical fibre
GB/T 28499.1-2012
Technical requirement for IP video terminal equipment - Part 1: terminal based on ITU-T H.323
GB/T 28439-2012
General specification for thermal transfer ribbons
GB/T 28436-2012
Technical requirements and measurement methods of digital terrestrial television broadcasting exciter
GB/T 28435-2012
Technical specifications and methods of measurement for digital terrestrial television broadcasting transmitters
GB/T 28434-2012
Technical requirements and measurement methods of digital terrestrial television broadcasting single frequency network adapter
GB/T 28429-2012
DC Traction power cables and accessories up to 1500V for urban rail transit
GB/T 28428-2012
27.5kV and 2×27.5kV AC metal-enclosed switchgear and controlgear for electrification railway
GB/T 28427-2012
27.5kV single-phase AC XLPE insulation cable and accessories for electrification railway
GB/T 28426-2012
Rail flaw detection vehicle
GB/T 21642.4-2012
Technical requirements for IP video conference system devices - Part 4: Gatekeeper
GB/T 21642.3-2012
Technical requirements for IP video conference system devices - Part 3: multipoint control unit
GB/T 3028-2012
Marine electric signal lights
GB/T 3027-2012
Marine incandescent illumination lights
GB/T 28575-2012
Specification for YE3 Series（IP55）super-high efficiency three-phase induction motor（Frame size 80～355）
GB/T 28573-2012
Petroleum, petrochemical and natural gas industries steam turbines － General-purpose applications
GB/T 28572-2012
Series of large and medium inletvalves of hydraulic turbine
GB/T 28571.1-2012
The telecom equipment cabinet - Part 1: General specification