小剂量时可扩张静脉，使静脉回流减少，左室舒末压下降，使心脏前负荷降低，降低心肌耗氧量。
If minor doses are used, they can expand veins, lessen the vein reflux, cut down diastolic pressure or left ventricular end and cut down the load of the heart, and reduce the oxygen consumption.
针对国内其它相似装置，在不影响稀释蒸汽发生器负荷的情况下，采用中段回流取热用于工艺水汽提，合理利用热量。
Like other similar plant, when not to influence the heat duty of the dilution steam generation, the duty is adopted from the middle circumfluence to reach the energy utilization reasonably.
分析了精甲醇中水的来源，找出造成馏出口水含量超标的原因：回流量不能及时地根据生产负荷的变化而作相应的调节。
The source of water contained in fine methanol was analyzed. The reason of high water content is that the backflow is not timely adjusted according to the change of production load.
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