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经营范围
发明名称
REPLACEABLE MUD PUMP PISTON SEAL
摘要
申请公布号
EP1108170(A1)
申请公布日期
2001.06.20
申请号
EP19990933930
申请日期
1999.07.13
申请人
NATIONAL-OIL WELL, L.P.
发明人
STAGGS, MARK, ALAN;MILLER, DOUG
分类号
F04B53/14;F16J15/32;(IPC1-7):F16J9/00
主分类号
F04B53/14
代理机构
代理人
主权项
地址
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