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经营范围
发明名称
Tubing head
摘要
申请公布号
US2056543(A)
申请公布日期
1936.10.06
申请号
US19350005367
申请日期
1935.02.07
申请人
TSCHAPPAT SHERIDAN P
发明人
TSCHAPPAT SHERIDAN P.
分类号
E21B34/02
主分类号
E21B34/02
代理机构
代理人
主权项
地址
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