alloy steel casting

例句：

1. 1. The engineer designed the alloysteel casting for the new bridge.
   工程师为新桥设计了合金钢铸件。
2. 2. Thealloy steel casting was used to makethe heavy machine parts.
   合金钢铸件被用来制造重型机器部件。
3. 3. Thealloy steel casting isa critical component in the constructionof buildings.
   合金钢铸件是建筑施工中的关键部件。