ultraljud

ultraljud
s (-et) ljud med så hög frekvens att det ej kan uppfattas av människans öra

Clue 9 Svensk Ordbok. 2015.

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  • Ultrasonic foil (papermaking) — Ultrasonic foil = High power ultrasonics are used in the ultrasonic foils under the formation wire in a paper machine to produce paper of higher quality. On the top side of the formation wire over an ultrasonic foil, in the stock (fibre/water… …   Wikipedia

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