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发明名称
Rock Bolt
摘要
A hollow rock bolt comprising a shaft having a spiral form protruding from the exterior surface of the shaft, wherein the spiral form has a flank angle of between 30° and 60°.
申请公布号
AU2007214341(B8)
申请公布日期
2015.02.19
申请号
AU20070214341
申请日期
2007.08.31
申请人
发明人
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