爬升速度（垂直速度）指示器 压力驱动（涡轮机辅助飞机

This Aerospace Standard covers four basic types of direct reading pressure actuated rate of climb (vertical speed) indicators as follows:Type I - Range 0-2000 feet per minute climb and descentType II - Range 0-3000 feet per minute climb and descentType III - Range 0-4000 feet per minute climb and descentType IV - Range 0-6000 feet per minute climb and descentCross Reference: NACA1235