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发明名称
CROWN BIT
摘要
申请公布号
SU911004(A1)
申请公布日期
1982.03.07
申请号
SU19802865987
申请日期
1980.01.07
申请人
INST SVERKHTVERDYKH MAT
发明人
BUGAEV ALEKSANDR A,SU;LIVSHITS VALERIJ N,SU;BOGDANOV ROBERT K,SU;FADEEV VASILIJ F,SU;SHADRIN IVAN A,SU;GOLOD NIKOLAJ F,SU;OPOLSKIJ VIKTOR I,SU
分类号
E21B10/48;B28D1/04;(IPC1-7):21B10/48
主分类号
E21B10/48
代理机构
代理人
主权项
地址
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