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发明名称
Mine roof expansion anchor and bail member therefor
摘要
申请公布号
AU648207(B2)
申请公布日期
1994.04.14
申请号
AU19920028367
申请日期
1992.11.13
申请人
THE EASTERN COMPANY
发明人
RAYMOND L. WRIGHT
分类号
E21D21/00;(IPC1-7):E21D21/00
主分类号
E21D21/00
代理机构
代理人
主权项
地址
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