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ultradźwięki m
chem.	ultrasons m
ultrasnd.	ultrason m
ultradźwięk m
construct.	ultra-son m
el., acoust.	ultrason m
environ.	ultrason (fale dźwiękowe o częstotliwości 20 000 Hz)

ultradźwięki: 3 phrases in 3 subjects

Chemistry	1
Construction	1
Thermal Energy	1