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a number indicating the ratio of the speed of an object to the speed of sound in the medium through which the object is moving, kiirus väljendatuna helikiiruse kordsena
Machi number . Militerm | riigikaitseterminite andmebaas . Estonian Language Institute, Sõnaveeb 2026. https://sonaveeb.ee/search/unif//mil/Machi%20number/1/est (20.06.2026)
