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公开(公告)号:US4382721A
公开(公告)日:1983-05-10
申请号:US279403
申请日:1981-07-01
申请人: Norman S. King
发明人: Norman S. King
CPC分类号: E21D15/22 , E21D11/183
摘要: A mine roadway support stilt includes, on two opposing faces thereof, a plurality of deformable, longitudinally extending indentations and, on the remaining faces, additional indentations to inhibit improper insertion of the I-beam joist support normally received in said stilt.
摘要翻译: 矿井道路支撑高架在其两个相对的表面上包括多个可变形的纵向延伸的凹陷,并且在其余的表面上包括另外的压痕,以阻止正常接收在所述高跷中的工字梁托梁支架的不正确插入。