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发明名称
Improvements in or relating to the treatment of bitumen, pitch, tar of various origins and their mixtures
摘要
申请公布号
GB421269(A)
申请公布日期
1934.12.06
申请号
GB19330010371
申请日期
1933.04.06
申请人
EUGENE ROUAULT
发明人
分类号
C08L95/00
主分类号
C08L95/00
代理机构
代理人
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