fire cracker welding

例句：

1. 1. The fire cracker welding technique is used to join metal partstogether quickly and efficiently.
   火焰焊技术用于快速而有效地连接金属部件。
2. 2. In this workshop, we will learn how to use afire cracker welding torch formetalworking.
   在这个工作坊中，我们将学习如何使用火焰焊焊枪进行金属加工。
3. 3.The fire cracker welding processrequires precise control of the temperature and pressureto avoid damaging the workpiece.
   火焰焊过程需要精确控制温度和压力，以避免损坏工件。