单词	celestial circle
释义	celestial circle 天球大圆
随便看	speed gears speed generally speed generator speed giving speed govening cycloconverter speed governed induction clutch speed governing speed governing by frequency conversion speed governing characteristics speed governing device speed governing droop speed governing mechanism speed governing oil pump speed governing operation speed governing rate speed-governing rate speed-governing servomechanism speed governing system speed-governing system speed governing technology speed governing through converter speed governor speed governor characteristic speed governor control speed governor control lever