Effects of column stiffeners, bolt arrangement, bolt number, U-steel width and U-steel extended length are studied.
研究了柱加劲肋、螺栓排列、螺栓数目、槽钢宽度和槽钢下伸长度等的影响。
For rock roadway layout layer, the necessity and feasibility of using nude alley, a hell of arch, the U-steel shed, bolt net and spraying and other forms of support are expounded.
针对岩巷布置层位,阐述了采用裸巷、砌碹、u型钢棚、锚网喷等多种支护形式并存的必要性与可行性。
The mill comprises roll changing hydrocylinder (1), with rolling mill group (3), roll changer (2), post (4), worm wheel lifting gear (5), U-shaped frame (7), rotation ear (8) and bolt (9).
其特征在于本轧机包括换辊液 压缸(1)、换辊小车(2)、轧钢机辊组(3)、立柱(4)、蜗轮升降机构(5)、U型架(7)、转动转耳(8)、连接螺栓(9);
The mill comprises roll changing hydrocylinder (1), with rolling mill group (3), roll changer (2), post (4), worm wheel lifting gear (5), U-shaped frame (7), rotation ear (8) and bolt (9).
其特征在于本轧机包括换辊液 压缸(1)、换辊小车(2)、轧钢机辊组(3)、立柱(4)、蜗轮升降机构(5)、U型架(7)、转动转耳(8)、连接螺栓(9);
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