GB
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中華人民共和國國家標準
NATIONAL
STANDARD OF THE PEOPLE'S REPUBLIC OF CHINA
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GB 474-2008
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Method for preparation of coal sample 煤樣的制備方法 |
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Issued Date:2008-12-04 |
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Implemented Date:2009-05-01 |
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Issued by: |
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The Standardization Administration of the People's Republic of China |
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