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发明名称
COAL EXCAVATING SET
摘要
申请公布号
SU870734(A1)
申请公布日期
1981.10.07
申请号
SU19792797623
申请日期
1979.07.13
申请人
VENGER FEDOR ,SU
发明人
VENGER FEDOR I,SU
分类号
E21D23/00;(IPC1-7):E21D23/00
主分类号
E21D23/00
代理机构
代理人
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地址
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