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经营范围
发明名称
Well perforator
摘要
申请公布号
US3237706(A)
申请公布日期
1966.03.01
申请号
US19640336469
申请日期
1964.01.08
申请人
DRESSER INDUSTRIES, INC.
发明人
VENGHIATTIS ALEXIS A.
分类号
E21B43/116
主分类号
E21B43/116
代理机构
代理人
主权项
地址
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