词汇	pump drive gear
释义	pump drive gear 泵传动齿轮
随便看	derivation regulating action derivation rule derivative derivative absorption spectroscopy Derivative absorption spectrum derivative accounting convention derivative accumulation derivative AC polarograph derivative acquisition derivative action derivative ac-tion derivative action coefficient derivative-action coefficient derivative action control derivative action controller derivative action factor derivative action gain derivative action rate derivative action time derivative action time constant derivative-action time constant derivative activation analysis derivative activities derivations derivation sequence