旋转式风速计

rotary valve

rotary drill bit (rotary boring head) deep drilling

flexible drive mechanism for interconverting rotary motion and oscillating motion

rotary tippler【矿】

rotary roughening【机】

rotary machinery

rotary-drum furnace, revolving melting furnace, revolving reverberatory furnace

rotary switch with latch for change of direction of rotation and snap-action