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发明名称
MINE WORKING ROOF SUPPORT
摘要
申请公布号
SU846743(A1)
申请公布日期
1981.07.15
申请号
SU19792826976
申请日期
1979.10.10
申请人
SHIROKOV ANATOLIJ P,SU
发明人
SHIROKOV ANATOLIJ P,SU
分类号
E21D21/00;(IPC1-7):E21D21/00
主分类号
E21D21/00
代理机构
代理人
主权项
地址
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