Nguyên lý làm việc của máy đóng gói túi van siêu âm
The ultrasonic valve bag packer also called an ultrasonic valve bag packing machine, is a device that uses ultrasonic technology for packaging and sealing. Ultrasonic is a sound wave with a frequency higher than what the human ear can hear, and its frequency range is generally above 20kHz, it is one of the 6