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GB standards are the China national standards; Prefix code GB are Mandatory standards, GB/T are Recommended standards; All products or service must be compliance with GB standards; If you want to export products or services to huge Chinese market, need ensure they are meet the requirements of GB china national standards; We provide Chinese GB standards and English version GB standards Lookup, Translate, Download, Imported Commodity GB standards Testing and Compliance review services. |
| Standard Code | Standard Title | Standard Class | Order |
|---|---|---|---|
| GB 3378-1982 |
Subscriber line signalling system for telephone automatic swiTChing network 电话自动交换网用户信号方式 |
China National Standards TC |
 English PDF |
| GB 3377-1982 |
Multifrequency register signalling system for telephone automatic swiTChing network 电话自动交换网多频记发器信号方式 |
China National Standards TC |
English PDF |
| GB 3376-1982 |
Inband pulsing single frequencyline signalling system for telephone automatic swiTChing network 电话自动交换网带内单频脉冲线路信号方式 |
China National Standards TC |
English PDF |
| GB/T 2291-1980 |
Method for preparation of coal tar piTChs specimens 煤沥青试验室试样的制备方法 |
China National Standards TC |
English PDF |
| GB/T 1989-1980 |
Methods for indication of the 7-bit encoding character set for information processing swiTChing on 12.7 mm magnetic tape 信息处理交换用七位编码字符集在9磁道12.7 毫米磁带上的表示方法 |
China National Standards TC |
English PDF |
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