ultrasonic checking

例句：

1. 1. Ultrasonic checking is a non-invasive method for detecting defects in materials.
   超声波检查是一种非侵入性的检测材料缺陷的方法。
2. 2.During the ultrasonic checking process, the machine sends high-frequency sound waves through the material to identify any flaws.
   在超声波检查过程中，机器通过材料发送高频声波以识别任何缺陷。
3. 3. The ultrasonic checking equipment is used to inspect the quality of metal parts before they are assembled.
   超声波检查设备用于在组装金属部件之前检查其质量。