It is better to use the weighted average efficiency to appraise the true condition of filters according to the weight of dust fed.
为了更好的把握评价过滤器的真实使用情况，应该采用发尘量的加权平均效率进行评价。
It is better to use the weighted average efficiency to appraise the true condition of filters according to the weight of dust fed.
为了更好的把握评价过滤器的真实使用情况，应该采用发尘量的加权平均效率进行评价。
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