iron-powder process

例句：

1. 1.The iron-powder process is a key step in the production of steel.
   铁粉工艺是钢铁生产的关键步骤。
2. 2.During the iron-powder process, the molten iron is poured into molds to form billets.
   在铁粉工艺中，熔化的铁被倒入模具中形成钢坯。
3. 3. The iron-powder process has been widely used in the manufacturing of various metal products.
   铁粉工艺在制造各种金属产品方面得到了广泛应用。