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GB/T 7340-1987
Fixed resistors for use in electronic equipment--Part 6:Blank detail specification--Fixed resistor networks with individually measurable resistor of either different resistance values or different rated dissipations--Assessment level E
GB/T 7339-1987
Fixed resistors for use in electronic equipment--Part 6:Blank detail specification--Fixed resistor networks with individually measurable resistors， all of equal value and equal dissipation--Assessment level E
GB/T 7348-1987
The standard spectrum of whispered Chinese speech
GB/T 7347-1987
The standard spectrum of Chinese speech
GB/T 7343-1987
Methods of measurement of the suppresion characteristics of passive radio interference filters and suppression components over the frequency range of 10kHz to 30MHz
GB 7327-1987
Silicon carbide surge arresters for A.C.systems
GB/T 7342-1987
IEC provisional reference coupler for the calibration of earphones used in audiometry
GB/T 2019-1987
Fundamental parameters and technical requirements for audio tape recorders
GB/T 7325-1987
Petroleum products--Lubricating greases and oils--Determination of evaporation loss
GB/T 7326-1987
Lubricating grease--Corrosiveness to copper--Copper strip test
GB/T 7313-1987
Minimum performance requirements and methods of measurement for high fidelity loudspeaker systems
GB 491-1987
Calcium base grease
GB 7300-1987
Feed additive--Nicotinic acid
GB 7294-1987
Feed additive--Vitamin K3(menadions sodium bisulfite)
GB 7299-1987
Feed additive--Dextro calcium pantothenate
GB 7303-1987
Feed additive--Vitamin C (ascorbic acid)
GB 7298-1987
Feed additive--Vitamin B6
GB/T 7308-1987
Plain bearings--Thin-walled flanged half bearings--Dimensions， tolerances and methods of checking
GB 7291-1987
General requirements of graphical symbols concerning consumer interest
GB/T 7288.1-1987
Equipment reliability testing--Preferred test conditions indoor portable equipment--Low degree ofsimulation