high strength friction grip bolt
摩擦结合式高强度螺栓
a mounting hole for arranging the high strength friction grip bolt is arranged at the top of the rectangle steel pipe column.
所述的矩形钢管柱的上部开有用于安装高强螺栓的安装孔。
His father kept a tight grip on his collar in case he should make a bolt for the door.
他的父亲紧紧抓住他的衣领,防止他夺门而逃。
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