【运输】多相电流牵引引擎

barker of rotary-ring type【林】

rotary seal

rotary-piston pump oscillating-piston pump

rotary desk【油气】;rotary table【机】;rotating platform【机】

rotary-drilling machine mining, quarrying

speed gearing rotary-drilling machine with speed gearing for mining

multi-chamber rotary-drum furnace

rotary gyroscope for indicating the vertical