Well, in fact, the big ultrasonic cleaner equipment is used to clean such stuffs: Hardware parts, circuit boards, machinery, automobile parts, etc.
In addition, there are generally two cleaning agents while using ultrasonic cleaner equipment: Chemical cleaning agent and water-based cleaning agent.
As we can see, one cleaning medium is chemical, the other is physical. That’s to say, with the combination of these two mediums, the object can be cleaned fully and thoroughly.