Hangzhou Powersonic Equipment Co., Ltd. We are not only sale ultrasonic, but more research and learn ultrasonic. we are not for selling ultrasonic equipment, but more for sloving your problem
28Khz ultrasonic welding converter for Biodegradable Tea Bag sealing All sounds beyond the human hearing range are called ultrasound. Standardly the human hearing threshold is set at 18 kHz. An ...