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Coaster incorporates digital recording and membrane loudspeaker, recording being switched on by sensor which detects weight of mug or glass placed on it
Coaster incorporates digital recording and membrane loudspeaker, recording being switched on by sensor which detects weight of mug or glass placed on it
The coaster (12) incorporates a digital recording (13) and a membrane loudspeaker (14). The recording is switched on by a sensor (17) which detects the weight of a mug (11) or glass placed on it.
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