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发明名称
Well reamer
摘要
申请公布号
US2093603(A)
申请公布日期
1937.09.21
申请号
US19360078163
申请日期
1936.05.06
申请人
CHIKSAN OIL TOOL COMPANY, LTD.
发明人
ELLINGSEN FRANK
分类号
E21B10/16;E21B10/30
主分类号
E21B10/16
代理机构
代理人
主权项
地址
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