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发明名称
Well bore feeler
摘要
申请公布号
US1921522(A)
申请公布日期
1933.08.08
申请号
US19280259667
申请日期
1928.03.07
申请人
JOHN W. MACCLATCHIE
发明人
HAMER LELAND S.
分类号
E21B31/107;E21B47/08
主分类号
E21B31/107
代理机构
代理人
主权项
地址
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