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发明名称
INTERFRAME STRUT FOR MINE GALLERY LINING
摘要
申请公布号
PL142200(B4)
申请公布日期
1987.09.30
申请号
PL19840246987
申请日期
1984.03.30
申请人
发明人
分类号
E21D;E21D11/28;(IPC1-7):E21D11/28
主分类号
E21D
代理机构
代理人
主权项
地址
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