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经营范围
发明名称
SOLVENT DEASPHALTING
摘要
申请公布号
CA639922(A)
申请公布日期
1962.04.17
申请号
CAD639922
申请日期
申请人
TEXACO DEVELOPMENT CORPORATION
发明人
DAVID K. BEAVON
分类号
主分类号
代理机构
代理人
主权项
地址
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