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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GBJ 22-1987
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Code for design of roads in factories and mining areas 廠礦道路設計規範 |
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Issued Date:1987-12-15 |
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Implemented Date:1988-08-01 |
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Issued by: |
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The Standardization Administration of the People's Republic of China |
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