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发明名称
Rock bolts
摘要
申请公布号
US3226934(A)
申请公布日期
1966.01.04
申请号
US19610110574
申请日期
1961.05.16
申请人
C-I-M CONSULTANTS LIMITED
发明人
EMERY CHARLES L.
分类号
E21D21/00
主分类号
E21D21/00
代理机构
代理人
主权项
地址
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