final resistance of filter
... filltration velocity过滤速度 final resistance of filter过滤器终阻力 fire damper防火阀 ...
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通过过滤器使用费用，过滤器终阻力确定及各级过滤器效率变化，简单分析了空气过滤器的应用及经济性。
The application and its economy of the air filter are analyzed in brief, through its operation cost, final resistance and the filter efficiency.
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