In China's standard classification, the magnetic *** vibration used involves medical radiographic equipment, medical device synthesis, medical equipment, extracorporeal circulation, artificial organs, prosthetic devices, medical electronic instruments and equipment, orthopedic surgery, orthopedic instruments, medical ultrasound, laser, high-frequency instrumentation, physical therapy and traditional Chinese medicine instruments and equipment, general requirements for medical equipment, general diagnostic equipment, radiation hygiene protection, inductors, transformers, basic standards and general requirements, and industrial hygiene, graphic symbols. Transformers, basic standards and general methods, physics and mechanics, computer peripherals, body and moving parts.