welding blowpipe

例句：

1. 1. The weldingblowpipe is used to create a tightfit between two pieces of metal.
   焊接吹管用于两块金属之间形成紧密配合。
2. 2.The welding blowpipe was theonly tool available for this type of welding job.
   焊接吹管是这种焊接工作的唯一工具。
3. 3. The weldingblowpipe was used to heat up themetal and then quickly cool it down toharden it.
   焊接吹管被用来加热金属，然后迅速冷却它以使其硬化。