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| Standard Code | Standard Title | Standard Class | Order |
|---|---|---|---|
| SJ 20652-1997 |
Technical requirements for verbal explanation of the military digital secure automatic telephone network 军用数字保密自动电话网语音编解技术要求 |
China Electronics
Standards verbal |
 English PDF |
| HG/T 20686-1990 |
Unified regulations on images and verbal symbols in electrical design for enterprises in chemical industry 化工企业电力设计图形和文字符号统一规定 |
China Chemical Industry
Standards verbal |
English PDF |
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