Xaiv rau: nyob rau hauv tus txheej txheem ntawm ultrasonic yas vuam, nyob rau hauv view ntawm lub acoustic system input teeb liab cuam tshuam los ntawm load hloov ncaj qha vuam txheej txheem, ib tug ultrasonic teeb liab kuaj system yog tsim, yuav ua tau nyob rau hauv tus txheej txheem ntawm ultrasonic yas vuam zog, voltage, tam sim no. ..
Nyeem ntxiv