短語(yǔ)詞組短語(yǔ)truss -bolt system 錨拉支架系統(tǒng)truss bolt west bank 桁架螺栓king bolt truss 鋼吊桿桁架king bolt bush bolt truss 鋼吊桿桁架king bolt bush truss 有中柱的桁構(gòu)bolt welding truss 栓焊桁梁橋 返回 truss bolt