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发明名称
Mercury stuffing-box bearing unit
摘要
申请公布号
US2462901(A)
申请公布日期
1949.03.01
申请号
US19450603395
申请日期
1945.07.05
申请人
ROBISON GERSON H
发明人
ROBISON GERSON H.
分类号
E21B33/035;F16J15/40
主分类号
E21B33/035
代理机构
代理人
主权项
地址
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