welding tin billet

例句：

1. 1.The welding machine is used to join metal parts together.
   焊接机用于将金属部件连接在一起。
2. 2. The welder was asked to inspect the welding process.
   焊工被要求检查焊接过程。
3. 3. The welding job requires a lot of precision and attention to detail.
   焊接工作需要高度的精确性和对细节的关注。