For washing frequency, under normal circumstances, the best car once a week.
对于洗车频率，一般情况下，一周洗一次车最好。
The show energy conservation effect of frequency control system is the best.
说明了变频调速系统的节能效果是最好的。
The frequency may keep switch at the same condition, it is the best experiment using.
频率可以保持在相同的条件下切换，它是最佳的实验使用。
Host speed regulator with frequency converter means, in order to best speed, the effect better.
采用变频方式调节主机转速，以求最佳的线速度，效果更理想。
Host speed regulator with frequency converter means, in order to best speed, the effect better.
采用变频方式调节主机转速，以求最佳的线速度，效果更理想。
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