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经营范围
发明名称
EXTERNAL WELLHEAD CONNECTOR MEANS
摘要
申请公布号
US3558160(A)
申请公布日期
1971.01.26
申请号
USD3558160
申请日期
1968.11.14
申请人
DEEP OIL TECHNOLOGY INC.
发明人
CHESTER B. FALKNER
分类号
E21B33/038;F16L37/12;F16L37/252;(IPC1-7):F16L19/00
主分类号
E21B33/038
代理机构
代理人
主权项
地址
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