Ultrasonic nas repellent tuaj yeem tua nas.Cov zis zaus ntawm ultrasonic nas repellent yog siab dua 20,000 Hz, uas yog inaudible rau tib neeg, tab sis nas thiab kab laum yog rhiab dua.Tom qab hnov nws, lawv yuav hnov mob, ceeb, tsis xis nyob, poob ntawm ...
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