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发明名称
STRUT FOR A DOORFRAME-TYPE MINE LINING
摘要
申请公布号
PL113037(B1)
申请公布日期
1980.11.29
申请号
PL19770198973
申请日期
1977.06.17
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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