Damper: both gas flow regulating button and wind board are high grade PP material, connected with 304 stainless steel bar, manually adjust the outside valve knob, control air flow.
气流调节阀：气流调节扭与挡风板均为高密度PP材质，用304不锈钢方棒连接，手动调节外部阀门旋钮，控制气流量。
Electret filtration material is a kind of promising new air filtration material due to the advantages of high filtration efficiency, low flow resistance, power saving and anti-bacteria.
驻极体过滤材料具有高效、低阻、节能、抗菌等优点，是一类非常有应用前景的新型空气过滤材料。
A method of stepped-diameter design for pneumatic conveying pipelines, as well as relationship among pressure loss, ratio of material to air, and mass flow rate of materials etc.
介绍气力输送管道的变径设计方法和变径管道气力输送试验中压损、料气比、物料质量流量等间的关系。
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