并列题名：Ultrasonic machining Ultrasonic machining Ultrasonic machining. 并列题名：Electrochemical machining 并列题名：Ultrasonic diagnosis 并列题名：Combined machining 并列题名：Romantic maching 并列题名：Silicon micromachining 并列题名：Laser beam machining 并列题名：Electro-discharge machining