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发明名称
Improvements in or relating to the treatment of natural or artificial bitumen, asphalt and similar products
摘要
申请公布号
GB421113(A)
申请公布日期
1934.12.06
申请号
GB19330010372
申请日期
1933.04.06
申请人
EUGENE ROUAULT
发明人
分类号
C08K5/13
主分类号
C08K5/13
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代理人
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