常見(jiàn)例句雙語(yǔ)例句This method frequently caused the layer-shaped cracks in the center of the forgings, and also wasted a large number of the raw materials and working hours.這種方法不僅容易在鍛件心部產(chǎn)生層狀裂紋，而且浪費(fèi)了大量原材料和加工工時(shí)。 返回 working-hours method