GB
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中华人民共和国国家标准
NATIONAL
STANDARD OF THE PEOPLE'S REPUBLIC OF CHINA
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GB 712-2011
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Ship and ocean engineering structural steel 船舶及海洋工程用结构钢 |
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Issued Date:2011-06-16 |
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Implemented Date:2012-02-01 |
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Issued by: |
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The Standardization Administration of the People's Republic of China |
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