调速系统
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variable frequency speed control system 变频调速系统
variable speed turbine governing system 变速汽轮机调节系统
Frequency-variable speed-adjustable system 变频调速系统
variable speed system 变频调速系统
dc variable speed system 直流调速
Variable speed control motor system 无极变速控制马达系统
Variable-speed constant-frequency Control System 变速恒频控制系统
ac variable speed system 交流调速
speed variable system
变速系统
以上为机器翻译结果，长、整句建议使用 人工翻译 。
It is pitching a new ventilation system that would fill a mine with sensors, dampers and louvers along with variable speed fans that will send only the right amount of air to the mine tunnels.
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