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发明名称
WORKING-FACE VALVE
摘要
申请公布号
SU578424(A1)
申请公布日期
1977.10.30
申请号
SU19752138429
申请日期
1975.05.30
申请人
VNII BUROVOJ TEKHNIKI
发明人
BRUDNYJ-CHELYADINOV SERGEJ YU,SU;SOROKOUMOV VIKTOR K,SU;BUDYANSKIJ VIKTOR S,SU
分类号
E21B17/00;(IPC1-7):E21B17/00
主分类号
E21B17/00
代理机构
代理人
主权项
地址
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