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经营范围
发明名称
MINE ROOF SUPPORTS
摘要
申请公布号
US3488966(A)
申请公布日期
1970.01.13
申请号
USD3488966
申请日期
1968.06.21
申请人
GULLICK LTD.
发明人
GERALD HERBERT COTTERILL
分类号
E21D23/00;(IPC1-7):E21D15/44;B61L11/02;E21D15/48
主分类号
E21D23/00
代理机构
代理人
主权项
地址
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