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发明名称
KEYED JOINT
摘要
申请公布号
RU2019694(C1)
申请公布日期
1994.09.15
申请号
RU19920002095
申请日期
1992.10.23
申请人
BORISOV VLADIMIR M;ANDREEV IVAN V
发明人
BORISOV VLADIMIR M;ANDREEV IVAN V
分类号
E21B17/03;E21B3/00;F16B3/00;(IPC1-7):E21C3/34
主分类号
E21B17/03
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代理人
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