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发明名称
OIL WELL DRILLING FLUID
摘要
申请公布号
CA416485(A)
申请公布日期
1943.11.16
申请号
CAD416485
申请日期
申请人
SHELL DEVELOPMENT COMPANY
发明人
HAROLD T. BYCK;HOWARD C. LAWTON;JOHN W. FREELAND
分类号
主分类号
代理机构
代理人
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