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| International Standard Category: Industrial process measurement and control |
HG/T 20637.6-1998 Preparation of instrumentation specification
仪表技术说明书的编制;
| Category No.: | 25.040.40 | Valid Status: | superseded |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: | 2018-04-01 |
| Superseded Standard.: | HG/T 20637.6-2017 Code for preparation of engineering design documents of instrumentation in chemical industry Preparation of instrumentation specification |
Superseded Date: | 2018-4-1 |
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