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Title Standard No. Implemented On
Mechanical coupling--ClassificationGB/T 12458-19901991-5-1
Verification Regulation of Self-balance Display Instruments with Step-contralJJG 706-19901991-2-1
Generic specification and measuring methods for rubidium frequency standardsGB/T 12498-1990 GB/T 12499-19901991-5-1
Electrical apparatus for explosive atmospheres Encapsulated electrical apparatus mGB 3836.9-19901991-3-1
Information processing systems -Open systems interconnection -Transport service definitionGB/T 12453-19901991-5-1
Method for determination of total acid in foodsGB/T 12456-19901991-3-1
Generic specification and measuring methods for rubidium frequency standardsGB/T 12498-19901991-5-1
Train Dispatching Telephone - Technical Requirements and Testing Method for Extension TB/T 2130.6-19901990-12-1
Steel butt - welding seamless pipe fittingsGB/T 12459-19901991-5-1
Information processing systems-Open systems interconnection-Connection oriented transport protocol specificationGB/T 12500-19901991-5-1
Method for determination of sodium chloride in foodsGB/T 12457-19901991-3-1
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