组合使用关键词、标准类型、状态与 ICS 分类，快速定位所需国家标准。
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GB/T 11595-1999
Interface between data terminal equipment(DTE) and data circuit-terminating equipment (DCE)for terminals operating in the packet mode and connected to public data networks by dedicated circuit
GB/T 11591-1999
Packet assembly/disassembly facility(PAD) in a public data network
GB/T 7400.11-1999
Digital television terminology
GB/T 13621-1999
Capacity series and radio-frequency channel arrangement and equipment main technical specifications for 100～1000 MHz radio relay communication systems
GB/T 17881-1999
Technical specifications of SDH transmission interface for broadcasting and television optical backbone network
GB/T 4961-1999
Time signal in radio broadcasting
GB/T 17626.11-1999
Electromagnetic compatibility--Testing and measurement techniques--Voltage dips，short interruptions and voltage variations immunity tests
GB 17625.2-1999
Electromagnetic compatibility--Limits--Limitation of voltage fluctuations and flicker in low-voltage supply systems for equipment with ratedcurrent≤16A
GB/T 7399.3-1999
Helical-scan video tape cassette system using 12.65 mm magnetic tape on type S-VHS
GB/T 17800.3-1999
Helical-scan video tape cassette systems using 8 mm magnetic tape--8 mm video--Part 3:High-band speci-fications for Hi 8
GB/T 17800.2-1999
Helical-scan video tape cassette systems using 8 mm magnetic tape--8 mm video--Part 2:PCM multi-track audio system
GB/T 17800.1-1999
Helical-scan video tape cassette systems using 8 mm magnetic tape--8 mm video--Part 1:General speci-fications
GB/T 3791-1999
Cassette for tape records--Dimensions and mechanical characteristics
GB/T 17799.1-1999
Electromagnetic compatibility--Generic standards--Immunity for residential，commercial and light-industrial environments
GB/T 16850.3-1999
Basic specification for optical fibre amplifier test methods--Part 3:Test methods for noisefigure parameters
GB/T 16850.2-1999
Basic specification for optical fibre amplifier test methods--Part 2:Test methods for powerparameters
GB/T 17801-1999
Interface betweendata terminal equipment(DTE) and data circuit-terminating equipment (DCE) for terminals operating in the packet mode and accessing a packet switched public data network through a public switched telephone network or an integrated service
GB/T 13997-1999
Technical requirement for 2048kbit/s，8448kbit/s，34368kbit/s，139264kbit/s optical line terminals
GB/T 17626.5-1999
Electromagnetic compatibility--Testing and measurement techniques--Surge immunity test
GB/T 11590-1999
International data transmission services and optional user facilities in public data networks and ISDNs