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发明名称
ANCHOR DEVICE FOR SECURING ROCK BOLTS
摘要
申请公布号
AU608391(B2)
申请公布日期
1991.03.28
申请号
AU19880026381
申请日期
1988.11.30
申请人
ENGINEERED INSTRUMENTS INC.
发明人
DENNIS MRAZ
分类号
E21D20/02;F16B13/14;(IPC1-7):E21D20/00
主分类号
E21D20/02
代理机构
代理人
主权项
地址
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