회전방향지시기

Revolution Telltale, Direction Indicator

회전속도계

Tacometer, Revolution Indicator

회전수누적계

Revolution Counter

회전수텔레그래프

Revolution Telegraph

회전식경계신호등

Rotating Type Warning Signal Light

회전식기관

Rotary Engine

회전식밸브

Rotary Valve

회전식펌프

Rotary Pump

회전장치

Turning Gear

회전창

Clear View Screen