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经营范围
发明名称
ENTRY-DRIVING MACHINE
摘要
申请公布号
SU768970(A2)
申请公布日期
1980.10.07
申请号
SU19782684648
申请日期
1978.11.15
申请人
DO NI UGOLNYJ INSTITUT
发明人
SKOROBOGATOV SERGEJ V,SU
分类号
E21D9/11;E21C27/22;E21D9/10;(IPC1-7):E21C27/22
主分类号
E21D9/11
代理机构
代理人
主权项
地址
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