基本解釋[經(jīng)濟學]六角帶螺帽螺栓詞組短語短語hexagonal l bolt and nut 六角帶螺帽螺栓steel hexagonal bolt and nut 六角螺絲和螺母hexagonal bolt and nut更多詞組專業(yè)釋義經(jīng)濟學六角帶螺帽螺栓