Variable speed constant frequency generating system has been used in modern aircraft.
变速恒频电源系统已在现代飞机上使用。
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。
Digital variable frequency is a key technology of soft radio.
数字下变频技术是软件无线电中的关键技术之一。
Variable frequency motor drive, soft start, soft stop, stable and reliable, small impact.
采用变频电机驱动，软启动，软停止，平稳可靠，冲击小。
It is variable frequency drive that controls the movement of the belt.
不同频率的驱动控制压带的运动。
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。
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。
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