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发明名称
MINE ROOF SUPPORTS
摘要
申请公布号
US3483705(A)
申请公布日期
1969.12.16
申请号
USD3483705
申请日期
1967.04.19
申请人
GULLICK LTD.
发明人
STANLEY ROBERTS
分类号
E21D23/00;E21D23/03;(IPC1-7):E21D23/20;E21D11/00;E21C41/00
主分类号
E21D23/00
代理机构
代理人
主权项
地址
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