spotweld

例句：

1. 1.The carpenter used a spotweld to attach the wooden boards together.
   木匠用点焊将木板连接在一起。
2. 2.The construction worker applied a spotweld to reinforce the weak joint.
   建筑工人在加固薄弱的接合处应用了点焊。
3. 3. The engineer tested the spotweld for strength and durability before installing it in the machine.
   工程师在安装机器之前测试了点焊的强度和耐用性。