基本解釋[經(jīng)濟(jì)學(xué)]平槽頭螺栓詞組短語(yǔ)短語(yǔ)slotted flat mushroom -head fit bolt 有槽平頂菌頭配郃螺栓flat slotted head bolt更多詞組專(zhuān)業(yè)釋義經(jīng)濟(jì)學(xué)平槽頭螺栓