锅炉汽包在变工况运行时往往产生严重的“虚假水位”现象。
A severe phenomenon of false water level exists in boiler drum under varying operating conditions.
经实际运行表明，建立的模型在变工况运行时，能有效地提高测量精度。
Practical operation has shown that the above-cited model plays a key role in enhancing the measurement precision during operations under off-design conditions.
研究直接空冷系统变工况运行以及排汽活动特性，对于进步直接空冷机组运行水平具有重要意义。
It is of great significance to study operating performance and exhaust flow characteristic under off-design conditions of condenser system for the economic operation of direct air-cooled units.
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