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发明名称
PETROLEUM PITCH PREPARATION
摘要
申请公布号
GB1542953(A)
申请公布日期
1979.03.28
申请号
GB19760008826
申请日期
1976.03.05
申请人
GULF CANADA LTD
发明人
分类号
C01B31/00;C10C3/00;C10C3/04;C10G9/00;(IPC1-7):C10C3/00
主分类号
C01B31/00
代理机构
代理人
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地址
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