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发明名称
DRILLING FLUID AND METHOD
摘要
申请公布号
CA423068(A)
申请公布日期
1944.10.10
申请号
CAD423068
申请日期
申请人
GRAPHITE FRECS COMPANY
发明人
BARUCH CERF
分类号
主分类号
代理机构
代理人
主权项
地址
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