The NOx emission is high along with the great of primary air rate.
一次风率越大，氮氧化物排放量越大。
This increases the initial primary air fan size and reduces the forced draft fan sizes.
这会增加一次风机的尺寸而减小从动风扇的尺寸。
Meanwhile, the control of air flow, furnace negative pressure and primary air flow are introduced.
同时也介绍了送风量、炉膛负压和一次风量的控制。
Primary standard — an ambient air pollution standard designed to protect human health.
基本标准——一个旨在保护人类健康的周围空气污染级别。
The primary concern of an air traffic controller is safety.
空中交通管理员的主要责任就是保证安全。
The direct type of evaporative air cooler uses primary wet surfaces.
直接蒸发式空气冷却器是利用原有的湿表面工作的。
Primary impeller blades of vertical air compressor were broken down in the course of use.
某公司立空压机一级叶轮叶片在使用过程中断裂。
Primary impeller blades of vertical air compressor were broken down in the course of use.
某公司立空压机一级叶轮叶片在使用过程中断裂。
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