The circulation concentration is determined from the refrigerant differential holdup in heat exchangers.

系统的循环浓度根据换热器中制冷剂的分馏滞留程度来计算。

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Promote health: Ozone can quickly restore oxygen, increase indoor oxygen concentration, promote human cell activation, improve blood circulation and metabolism, prevent disease.

促进健康：臭氧可快速还原氧气，增加室内氧气浓度，促进人体细胞活化、改善血液循环和新陈代谢，预防疾病发生。

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The effect of reaction temperature, reaction pressure, catalyst concentration, ammonia circulation rate, condensing temperature on fatty nitriles reaction rate, yield, energy demand are discussed.

讨论反应温度、反应压力、催化剂的浓度、氨循环速率、冷凝温度对脂肪晴的反应速率、得率、能量消耗的影响。

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While the southern coast of Spain was once believed to have the highest concentration of 500-euro notes in circulation, the distinctive purple bill has become more like the unicorn of Europe because they are rarely seen.

FORBES: France Plans To Prohibit Cash Payments Over ��1,000