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此采暖系统的最大优点是节约能源，运行费用小。
The most important advantage of this system is saving energy resource and low running expense.
youdao
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系统结构简单，运行稳定，节约能源。
It is of simple structure, steady running and saving power.
youdao
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系统结构简单，运行稳定，节约能源。
It is of simple structure, steady running and saving power.
youdao