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Chinese Classification
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| International Standard Category: Industrial process measurement and control |
HG/T 20638-1998 Specification for details of engineering design of instrumentation
自控专业工程设计文件深度的规定;
| Category No.: | 25.040.40 | Valid Status: | superseded |
| Issued Organization: | State Bureau of Petroleum and Chemical Industries | Issued Date: | 1998-6-22 |
| Implemented Date: | 1999-1-1 | Abolished Date: | |
| Superseded Standard.: | HG/T 20638-2017 |
Superseded Date: | 2018-1-1 |
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