Glass frequency electrical transmission system using speed control.
玻璃传送系统采用变频电机调速控制。
Two control ring work together to realize variable speed constant frequency.
运行时机组的两个控制环同时工作，实现变速恒频。
For many years governor speed control was the only available means of controlling system frequency.
多年来用调速器控制速度是唯一控制系统频率的措施。
Host fan with variable frequency control, steady speed, low power, accurate and reliable.
主机风机采用变频控制，调速平稳、省电、准确可靠。
Frequency speed control, kick control, simple operation.
变频调速，脚踏控制，操作简便。
Frequency speed control, kick control, simple operation.
变频调速，脚踏控制，操作简便。
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