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经营范围
发明名称
Well head assembly
摘要
申请公布号
US2481035(A)
申请公布日期
1949.09.06
申请号
US19460642354
申请日期
1946.01.19
申请人
OIL CENTER TOOL COMPANY
发明人
PENICK ARTHUR J.
分类号
E21B33/00;E21B33/04
主分类号
E21B33/00
代理机构
代理人
主权项
地址
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