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üksühikuga suurus gaasi dünaamikas, mis iseloomustab voolava keskkonna vookiiruse ja helikiiruse suhet, in fluid dynamics, the Mach number is a one unit quantity representing the ratio of flow velocity past a boundary to the local speed of sound
flight Mach number . Metroloogia terminibaas. Estonian Language Institute, Sõnaveeb 2026. https://sonaveeb.ee/search/unif//mea/flight%20Mach%20number/1/eng (19.06.2026)