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发明名称
VALVE AND LUBRICATOR ASSEMBLIES
摘要
申请公布号
GB1594715(A)
申请公布日期
1981.08.05
申请号
GB19800019560
申请日期
1977.10.14
申请人
BAKER INTERNATIONAL CORP
发明人
分类号
E21B34/00;E21B34/10;(IPC1-7):E21B43/12
主分类号
E21B34/00
代理机构
代理人
主权项
地址
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