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发明名称
HYDRAULIC HAMMER
摘要
申请公布号
SU857466(A1)
申请公布日期
1981.08.23
申请号
SU19792785672
申请日期
1979.06.25
申请人
NI GORNORUDNYJ INSTITUT
发明人
DYDZINSKIJ VIKTOR V,SU;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
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地址
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