Mach indicator

• 马赫表,马赫数指示器,马赫数计

Mach indicator的用法和样例：

例句

1. The moving scale of the Mach number shows the value of Mach number within the limits of the operating altitudes and speeds.
   马赫数计指针显示了实用升限和实用速度内的马赫数。