【电学】转动部件

采用高转差率电动机，并增加旋转件的转动惯量，是综合提高游梁式抽油机节能效果的有效途径。

rotating

rotating

rotating drum

rotating ring debarker

mower with rotating blades (rotary mower)

print display element with print on rotating drum、disc

rotating blade column for liquid-solid extraction

prism member, rotating motion-picture camera