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发明名称
Drill pipe elevator
摘要
申请公布号
GB2158856(A)
申请公布日期
1985.11.20
申请号
GB19850009614
申请日期
1985.04.15
申请人
* WALKER-NEER MANUFACTURING CO INC
发明人
KEITH M * HANEY;CLYDE A * WILLIS
分类号
B25J15/02;E21B19/06;(IPC1-7):E21B19/06;B66C1/44
主分类号
B25J15/02
代理机构
代理人
主权项
地址
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