Remove the screws, washers and nuts from the lock handles for the air inlet duct.
从进气管道的锁手柄上拆下螺栓、垫圈和螺母。
When the sending and exhausting shaft is ventilated, short duct flow may occurred between outlet and inlet, which will baffle air exchange in highway tunnel.
在竖井送排式通风时，排风口和送风口之间可能产生短道流动，这种短道流动会阻碍隧道内的空气交换。
The damper configuration on inlet air duct to coal mills in pressurized direct pulverizing coal systems is analyzed and the optimized design schemes are presented.
分析正压直吹式制粉系统磨煤机进口风道的风门配置，得出最优化风门配置方案。
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