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发明名称
MINE ROOF SUPPORT SYSTEMS
摘要
申请公布号
GB1216712(A)
申请公布日期
1970.12.23
申请号
GB19680011055
申请日期
1968.03.07
申请人
BERGWERKSVERBAND GMBH
发明人
分类号
E21D23/00;E21D23/26;G05B19/44
主分类号
E21D23/00
代理机构
代理人
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