【化学】旋转炉，玻璃熔解炉

rotary drill with oil pressure

barker of rotary-ring type【林】

rotary seal

rotary

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

rotary gyroscope for indicating the vertical