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1281
posted by
Rob
17 Mar 2017
/pix/general/
Ultrasonic Transducer
https://m.youtube.com/watch?v=b3v7ctb2cFw
Oooooh...
1281
8
posted by Rob 17 Mar 2017
posted by Rob 17 Mar 2017
posted by Rob 17 Mar 2017