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发明名称
MINE FOOF SUPPORT SYSTEM
摘要
申请公布号
GB2021668(B)
申请公布日期
1982.09.29
申请号
GB19790008064
申请日期
1979.03.07
申请人
STAFFORD F
发明人
分类号
E21D19/04;E21D23/00;E21D23/08;(IPC1-7):E21D23/00
主分类号
E21D19/04
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代理人
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