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发明名称
HYDRAULIC PERCUSSION-ACTION MECHANISM
摘要
申请公布号
SU859622(A1)
申请公布日期
1981.08.30
申请号
SU19792750807
申请日期
1979.04.10
申请人
KRIVOROZHSKIJ GORNORUDNYJ INSTITUT
发明人
KOZYREV SERGEJ A,SU
分类号
E21B1/26;B25D9/00;(IPC1-7):E21C3/20
主分类号
E21B1/26
代理机构
代理人
主权项
地址
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