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	GB/T 9405-1995 Performance and test methods of the third order Digital multiplex equipment operating at 34368 kbit/s and using positive justification - 英文版
	GB/T 7254-1995 Performanceand methods of the second order Digital multiplex equipment operating at 8448 kbit/s and using positive justification - 英文版
	GB/T 15542-1995 Technical requirements of Digital SPC automatic telephone exchange - 英文版
	GB/T 11324-1995 Performance and test methods of the fourth order Digital multiplex equimpent operatingat 139264 kbit/s and using positive justification - 英文版
	GB/T 15521-1995 Format and classification of Digital audio tape cassette system (DAT) used for broadcasting - 英文版
	GB/T 11443.5-1994 Domestic satellite communication earth stations--General technical requirements--Part 5:Intermediate data rate(IDR) Digital carriers - 英文版
	GB 15215-1994 Global maritime distress and safety system--Performance requirements for Digital selective calling (DSC) equipment - 英文版
	GB/T 15118-1994 Technical requirement for Digital line systems on optical fibre cables at 4×139264 kbit/s - 英文版
	GB/T 14919-1994 The specifications for Digital audio sourcecoding - 英文版
	GB/T 14857-1993 The specifications of encoding parameters of Digital television for studio - 英文版
	GB/T 14381-1993 Generic specification for stored program control Digital private automatic branch telephone exchange system - 英文版
	GB/T 14132-1993 Performance requirements for Digital linesystems on symmetric pair cables used in telecommunication network - 英文版
	GB/T 14131-1993 Performance requirements for Digital linesystems on coaxial pair cables used in telecommunication network - 英文版
	GB/T 14130-1993 Performance requirements for Digital sections of metallic cables used in telecommunication network - 英文版
	GB/T 14082-1993 Generic specification of 9-track Digital magnetic head for digital magnetic tape unit - 英文版
	GB/T 13996-1992 Technical specification for Digital line systems on optical fibre cables - 英文版
	GB/T 14032-1992 General principles of measuring methods of Digital phase-locked loop for semiconductor integrated circuits - 英文版
	GB/T 13543-1992 Environmental test methods for Digital communication equipments - 英文版
	GB/T 13503-1992 Generic specification for Digital microwave radio relay communication equipment - 英文版
	GB/T 13426-1992 Reliability requirements and test methods for Digital communication equipment - 英文版
	GB/T 13158-1991 Compatibility test procedures of clock and synchronization equipment of Digital switch introducedinto digital network - 英文版
	GB/T 12640-1990 Methods of measurement for the Digital microwave radio relay communication equipments - 英文版
	GB/T 12166-1990 Electrical characteristics of unbalanced voltage Digital interface circuits - 英文版
	GB 12048-1989 Requirements for clock and synchronization equipment used in the Digital network - 英文版
	GB/T 11014-1989 Electrical characteristics of balanced voltage Digital interface circuits - 英文版
	GB/T 10199.2-1988 Test procedure for facsimile apparatus--Document facsimile (Digital) - 英文版
	GB 3971.2-1983 Interoffice junction Digital line signalling system for telephone automatic switching network - 英文版
	GB/T 3323.2-2019 Non-destructive testing of welds—Radiographic testing—Part 2:X- and gamma-ray techniques with Digital detectors - 英文版

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