tempered steel

例句：

1. 1. The engineer used tempered steel to make the machine parts stronger and more durable.
   工程师使用调质钢制作机器部件，使其更坚固耐用。
2. 2.The construction company was awarded a contract for building a bridge with tempered steel beams.
   建筑公司被授予合同，用于建造一座使用调质钢梁的桥梁。
3. 3.The steel manufacturer is known for its high-quality tempered steel products.
   这家钢铁制造商因其高品质的调质钢产品而闻名。