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发明名称
STYRSYSTEM FOER EN OEVERFYRVAEGSVENTIL OCH BORRNINGSFOERFARANDE.
摘要
申请公布号
FI904209(A0)
申请公布日期
1990.08.24
申请号
FI19900004209
申请日期
1990.08.24
申请人
INGERSOLL-RAND COMPANY
发明人
HAMNER, JEFFREY W.
分类号
E21B19/086;E21B44/02;(IPC1-7):F15B/
主分类号
E21B19/086
代理机构
代理人
主权项
地址
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