ultrasonic examination of concrete

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 ultrasonicscanner is used for non-invasivetesting of internal organs.
   超声波扫描仪用于非侵入性测试内脏器官。
3. 3. Ultrasonics are used in medicine tocreate images of the body.
   超声波在医学上用于创建身体图像。