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发明名称
Nonaqueous drilling fluid
摘要
申请公布号
US2217927(A)
申请公布日期
1940.10.15
申请号
US19400312098
申请日期
1940.01.02
申请人
SHELL DEVELOPMENT COMPANY
发明人
CAMPEN PIETER VAN
分类号
C09K8/32
主分类号
C09K8/32
代理机构
代理人
主权项
地址
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