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Q: How is working frequency of ultrasonic?

gevraagd door Choze op 2021-11-23 02:23:48

Ebberman I had one like this before. It walked across the table and made a terrible noise. Ultrasonic means beyond human hearing. 2 x AAA is a joke.

2021-12-20 01:15:28 Nuttig (2)
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