high and low water change
high and low water change
高低水位变化
以上为机器翻译结果，长、整句建议使用 人工翻译 。
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With the change of environmental temperature, the air sourced heat pump water heater will frost in winter and the low pressure will be too high in summer.
随着环境的变化，热泵热水机将出现冬季结霜，夏季出现低压压力过高的现象。
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