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发明名称
SEAL ASSEMBLIES
摘要
申请公布号
GB8508529(D0)
申请公布日期
1985.05.09
申请号
GB19850008529
申请日期
1985.04.02
申请人
NOWSCO WELL SERVICE (UK) LTD;DREXEL OILFIELD SERVICES (HK) LTD
发明人
分类号
F16J15/16
主分类号
F16J15/16
代理机构
代理人
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