(1) Ultrasonic zaus: qhov qis dua, qhov zoo dua qhov cavitation, qhov ntau dua, qhov zoo dua qhov cuam tshuam.Rau qhov yooj yim nto ultrasonic tu, tsis tshua muaj zaus xws li 28khz yuav tsum tau siv, thiab siab zaus yuav tsum tau siv rau complex nto thiab tob qhov muag tsis pom ho ...
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