Qhov zaus ntawm ultrasonic yoj yog qhov zaus ntawm kev vibration ntawm lub suab.Qhov hu ua vibration zaus yog tus naj npawb ntawm cov lus tsa suab ib ob, chav tsev yog Hertz, lossis Hertz luv.Wave yog propagation ntawm kev co, uas yog, kev co yog kis ntawm th ...
Nyeem ntxiv