例句與造句

1. Abstract : this paper explains the design of piercing die for steel tube , especially the manufacturing process using bench worker ' s experience to reduce the manufacturing cost . meanwhile , it also introduces the design of bending die for steel tube using the principle of take - out - slug , which can improve the work efficiency
   文摘:介紹鋼管沖孔模具的設(shè)計，如何利用鉗工的操作技能來制造上、下沖孔模具，降低制造成本；以及不用抽芯塊的原理來設(shè)計鋼管彎曲模具，從而提高工作效率。
2. It's difficult to find piercing dies in a sentence. 用piercing dies造句挺難的