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经营范围
发明名称
Reservoir gland stuffing box
摘要
申请公布号
US2857183(A)
申请公布日期
1958.10.21
申请号
US19560586979
申请日期
1956.05.24
申请人
TSCHAPPAT SHERIDAN P
发明人
TSCHAPPAT SHERIDAN P.
分类号
E21B33/08;F04B53/16;F16J15/18
主分类号
E21B33/08
代理机构
代理人
主权项
地址
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