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Professional Standard Category: Professional Standard - Energy |
Category No.: | NB | Valid Status: | superseded |
Issued Organization: | National Energy Administration | Issued Date: | 2017-02-10 |
Implemented Date: | 2017-7-1 | Abolished Date: | |
Superseded Standard.: | NB/T 20009.3-2021 Welding material for pressurized water reactor nuclear power plants. Part 3:Stainless steel covered electrodes |
Superseded Date: | 2022-3-22 |
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