frequency domain model reduction method 频域模型降阶法
frequency reduction 减少班次
low-frequency load reduction 低周减载
reduction frequency
降低频率
以上为机器翻译结果，长、整句建议使用 人工翻译 。
Changing volume ratio of the two-chamber muffler can improve the effective noise reduction frequency range of the muffler.
通过改变消声器的两腔容积比，可以改善消声器的有效消声频率范围。
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Flybe say they are not considering a reduction in the number of routes and destinations they fly to, but the frequency of flights from Belfast each day is under review.
BBC: McDonalds creates 100 new jobs as Flybe cuts staff
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