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经营范围
发明名称
WELLHEAD CONNECTOR
摘要
申请公布号
SG47590(G)
申请公布日期
1990.09.21
申请号
SG19900000475
申请日期
1990.06.30
申请人
OTIS ENG CO
发明人
分类号
E21B33/038;E21B33/076;(IPC1-7):F16L37/12
主分类号
E21B33/038
代理机构
代理人
主权项
地址
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