ultrasonic plastic welder

例句：

1. 1.Ultrasonic waves are used to diagnose heart disease.
   超声波用于诊断心脏病。
2. 2. The ultrasonic cleaner is very effective at cleaning hard-to-reach surfaces.
   超声波清洁器在清洁难以到达的表面方面非常有效。
3. 3. Ultrasonic welding is a process that uses high-frequency sound waves to join metal parts together.
   超声波焊接是一种使用高频声波将金属部件连接在一起的过程。