By use of VVVF technology to directly control elevator door operation simplified the mechanical structure of elevator door device with low noise in door closing and leveling in exact position.
采用VVVF技术对电梯开门机直接拖动，使电梯门机装置机械结构简化，关闭时噪声低，且可靠到位。
Mechanical vibration and noise not only hurt system of human being but also threaten the precise of instrument, and damping technology is one of the most efficient methods to control them.
振动和噪声不仅危害人的听觉系统，还会加速机械结构的老化，影响设备及仪表的精度和使用寿命，阻尼减振技术是有效控制振动和噪声的方法。
Mechanical vibration and noise not only hurt system of human being but also threaten the precise of instrument, and damping technology is one of the most efficient methods to control them.
振动和噪声不仅危害人的听觉系统，还会加速机械结构的老化，影响设备及仪表的精度和使用寿命，阻尼减振技术是有效控制振动和噪声的方法。
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