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Professional Standard Category: Professional Standard - Marine |
Category No.: | HY | Valid Status: | superseded |
Issued Organization: | Issued Date: | 1999-04-26 | |
Implemented Date: | 1999-7-1 | Abolished Date: | |
Superseded Standard.: | HY/T 047-2016 The specification for engineering sea ice techniques |
Superseded Date: | 2017-2-1 |
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