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经营范围
发明名称
Drilling fluid
摘要
申请公布号
US3042607(A)
申请公布日期
1962.07.03
申请号
US19600000695
申请日期
1960.01.06
申请人
MORRIS GEORGE R
发明人
MORRIS GEORGE R.
分类号
E21B21/00
主分类号
E21B21/00
代理机构
代理人
主权项
地址
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