GSM-R digital mobile communication system application service radio transmission system for railway traffic control command information
发布日期:2010-06-26 实施日期:2010-08-01
High power amplifier with up converters for satellite communication earth station equipment technical requirement
发布日期:2013-04-25 实施日期:2013-06-01
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发布日期:2003-07-07 实施日期:2003-07-07
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发布日期:1984-11-28 实施日期:1985-10-01
Regulation of Verification for PCM Error Tester
发布日期:1994-02-18 实施日期:1994-09-01
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发布日期:2012-12-31 实施日期:2013-06-01
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发布日期:2006-02-10 实施日期:2006-05-01
System and interface on surface equipment for VHF digital communication between heaven and earth
发布日期:2002-01-31 实施日期:2002-05-01
GSM-R digital mobile communication system applications information transmission system of operation and control for locomotive synchronization
发布日期:2010-06-26 实施日期:2010-08-01
Requirement and measurement methods of electromagnetic compatibility for 900/1800MHz TDMA digital cellular telecommunications system part 2:base station and ancillary equipment
发布日期:2011-05-18 实施日期:2011-06-01
Multicore and symmetrical piar/quad cables for digital communications Horizontal floor wiring-solid polyolefine insulate ...
实施日期:1999-10-01
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