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发明名称
HIGH-FREQUENCY PERFORATOR
摘要
申请公布号
SU857465(A1)
申请公布日期
1981.08.23
申请号
SU19792779402
申请日期
1979.03.28
申请人
VNI PK I GORNORUDNOGO MASHINOSTROENIYA
发明人
NEJMIRKO IOSIF V,SU;LUTKOVSKIJ NIKOLAJ N,SU;PETREEV ANATOLIJ M,SU;LIPIN ANATOLIJ A,SU
分类号
E21B1/24;B25D9/00;E21C37/24;(IPC1-7):E21C3/04;E21C3/24
主分类号
E21B1/24
代理机构
代理人
主权项
地址
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