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Drehzahländerungen f
gen.	variations in the number of revolutions
Drehzahländerung f
engin.	engine-speed change; rpm change
meas.inst.	change in speed
mech.eng.	speed change; speed variation
mech.eng., el.	regulation
tech.	speed regulation

Drehzahländerungen: 9 phrases in 4 subjects

Electric motors	5
Measuring instruments	2
Mechanic engineering	1
Technology	1