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Mach number
phys.sc., transp., avia.	número de Mach
tech.	la relación entre la velocidad anemométrica verdadera y la velocidad del sonido
English thesaurus
Mach number
avia., amer.	The ratio of the speed of an object to the local speed of sound
meteorol., abbr.	M
MACH number
post	4 digit number identifying PSDS input device (MODS report abbreviation)

Mach number: 20 phrases in 4 subjects

Earth sciences	8
Physical sciences	2
Technology	3
Transport	7