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发明名称
WELLHEAD SIDEWALL ELECTRICAL PENETRATOR
摘要
申请公布号
GB2058881(B)
申请公布日期
1983.01.19
申请号
GB19800023172
申请日期
1980.07.16
申请人
COMBUSTION ENG INC
发明人
分类号
E21B33/04;(IPC1-7):E21B33/04
主分类号
E21B33/04
代理机构
代理人
主权项
地址
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