馬赫

Ma3 he4

Mach (name), Ernst Mach (1838-1916), German physicist, Mach (aeronautics), unit of speed based on speed of sound = 1 Mach = 1224 km per hr

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馬赫|马赫 [Mǎ hè] ► Mach (name) ► Ernst Mach (1838-1916), German physicist ► Mach (aeronautics), unit of speed based on speed of sound = 1 Mach = 1224 km per hr