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发明名称
Врубовая машина
摘要
申请公布号
SU54484(A1)
申请公布日期
1938.11.30
申请号
SU19380015917
申请日期
1938.04.05
申请人
YARMAK YU.I.
发明人
YARMAK YU.I.
分类号
E21C25/00;E21C25/50
主分类号
E21C25/00
代理机构
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