排放阀可以将收集的液体和固体微粒排放掉，防止液体流向下游端，污染下游端的压缩空气系统。
Discharge valve can be will collect the liquid and solid particle emissions, prevent the liquid flow off the downstream, the pollution downstream compressed air system.
开启排气针形阀，并从软管排放空气。然后关闭排气阀。
Open vent needle valve and bleed air from hose. Then close vent valve.
按照规程的要求，排出安全阀气隙和排放管道的空气。
Vent the air gap and drain line from the relief valve in accordance with code requirements.
试验表明：安装催化转化器和二次空气供给阀后的二冲程摩托车的排放有了明显的下降。
The experimental results have shown that exhaust emissions from two stroke motorcycle with the catalytic converter and feeding valve for secondary air have been reduced obviously .
开启针形阀“B”排放空气，然后关闭“B”和排气针形阀。
Open needle valve "b" to bleed air and then close "b" and vent needle valve.
从组件上排放空气，关闭2号关闭阀。
从组件上排放空气，关闭2号关闭阀。
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