板鼓
- 网络Pan-ku
板鼓 板鼓
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[a small drum for marking time;Chinese musical instrument bangu for beating time] 一面蒙有牛皮、发音响脆的打击乐器,用于乐队指挥
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用多孔滤板鼓泡器，气体流量为0.5、1.0、1.2和1.5L／min时，E分别为98%、95%、90%和86%。
E is measured by using the glass frits bubbler , at sampling flow rate of 0.5 , 1.0 , 1.2 and 1.5 liter / min , and E is 98 % , 95 % , 90 % and 86 % respectively .
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化学法主要是在气水系统中加入表面活性剂，机械法就是增加反应系统的扰动，增加气水接触面积，主要有：顶部喷淋法、机械搅拌法和孔板鼓泡法。
The chemical method is mainly to add surfactant in the gas-water system , and the mechanical methods are mainly as follows : the water-spraying reactor , machine stir tank and gas-bubbling kettle .