4秒二次回路中的备用水泵自动启动。
4 SEC Backup pumps within the secondary loop automatically turn on.
0秒二次回路中的水泵因为一个小故障而自动关闭。
0 SEC the pumps in the secondary loop shut down automatically, due to a slight malfunction.
8分钟一个操作员注意到二次回路备用水泵的阀门是关的，于是打开了阀门。二次回路现在运作正常。
8 min An operator notices that the valves for the backup pumps in the secondary loop are off. He opens the valves. The secondary side now operating normally.
从节能的角度，阐述了变频技术在二次泵变水量系统中的应用，对变频水泵的能耗进行了分析。
From the viewpoint of energy saving, the application of variable frequency technology in the secondary pump system was expounded and the energy consumption of variable frequency pump was analyzed.
通过对离心式水泵高效工作区的性能曲线进行二次拟合，分析了离心式水泵机组并联调速运行特性。
The parallel-connection and variable-speed operation characters of the centrifugal pump groups are studied by conics fitting of the character curves in the high efficiency area.
风冷式热交换器防腐翅片，制造是采用二次翻边翅片机涨管工艺，无需另加装冷却水泵及水塔，运行可靠，清洗方便，冷量强劲，噪声低，寿命长，操作简单方便。
Don't need another pump and water tower. the machine have the features such as reliable in running, clean easily, strong cooling capacity, low noise, long service life and easy to operate.
改造后二次循环水泵的节电效率高达35%，节能效果十分显著。
The reformation effect is notable and the rate of power saving is over 35%.
改造后二次循环水泵的节电效率高达35%，节能效果十分显著。
The reformation effect is notable and the rate of power saving is over 35%.
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