マッハ数 であれば
mahhasūdeareba
1. If the Mach number; When the Mach number
Noun
#297517
1. If the Mach number; When the Mach number
1. several years; a few years
1. suit (clothing)
2. suit
1. a few years ago; some years back
1. several times; a few times
1. several months
1. number of days
1. to count; to enumerate
1. frequency (esp. of waveforms)