What are the brands of domestic ultrasound bone power systems? Which is better?

The domestic ultrasonic bone power system is referred to as ultrasonic bone knife, ultrasonic surgical instrument, which is a high-tech medical device. At present, in the country only water wood canopy and speed Mai. These two are national enterprises, for the development of the domestic ultrasonic bone knife industry has made outstanding contributions, but according to orthopedic surgeons, in this field can do percutaneous endoscopic surgery minimally invasive surgery only water wood canopy ultrasonic bone knife.