单词	倒螺旋
释义	同倒螺旋--变动螺旋
随便看	mechanical twinning mechanical twins mechanical-type manometer mechanical unit mechanical vacuum pump mechanical valve mechanical vapouf re-compression mechanical vapour recompression mechanical variables control mechanical variables measurement mechanical variables transducers mechanical vector mechanical--vector mechanical ventilation mechanical ventilation drying mechanical ventilation--mechanical draft-- supply ventilation mechanical verification mechanical vertigo mechanical vibrating conveyor mechanical vibrating feeder mechanical vibrating system mechanical vibration mechanical vibration generator mechanical vibration generator system mechanical vibration table