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经营范围
发明名称
OIL WELL PRODUCTION SYSTEM
摘要
申请公布号
US3548939(A)
申请公布日期
1970.12.22
申请号
USD3548939
申请日期
1968.12.19
申请人
SUN OIL CO.
发明人
JOHN D. BENNETT
分类号
E21B43/12;E21B43/34;(IPC1-7):E21B43/12
主分类号
E21B43/12
代理机构
代理人
主权项
地址
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