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Ventilsteuerung f f =
engin.	valve timing
meas.inst.	valve setting
tech.	valve control; valve timing gear; valve control mechanism; valve gear; valve regulation
transp., mech.eng.	poppet-valve distribution; poppet-valve gear; poppet-valve motion

Ventilsteuerung: 4 phrases in 3 subjects

Engines	2
Gear train	1
Mechanic engineering	1