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发明名称
Metal-to-metal seal devices
摘要
申请公布号
US3378269(A)
申请公布日期
1968.04.16
申请号
US19650428318
申请日期
1965.01.27
申请人
ARMCO STEEL CORPORATION
发明人
CASTOR EDWARD E.
分类号
E21B33/038;F16J15/08
主分类号
E21B33/038
代理机构
代理人
主权项
地址
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