machine welding torch

例句：

1. 1. The machine welding torch is used to join metal parts together.
   机器焊接焊枪用于将金属部件连接在一起。
2. 2. Welding torches are essential tools for welding operations.
   焊枪是焊接操作中必不可少的工具。
3. 3.The welding torch was used to repair the damaged part of the machine.
   焊枪被用来修理机器损坏的部分。