Ultrasound in industry, agriculture, medicine, military what are the instances of

Industry is often used to detect defects in metal welds, i.e., ultrasonic non-destructive testing, which is used to examine the internal structure without damaging it. Ultrasound can also be used to pulverize things into tiny particles. Medical ultrasound, and non-destructive testing of the same reason, in recent years, ultrasonic focusing energy is also used to treat tumors, no surgery without pain, good results, but the equipment manufacturing difficulties. Military ultrasound can be used to detect underwater targets, such as torpedoes submarines, ultrasound detection distance is very short, but accurate positioning.