distributed variable-frequency pump
distributed variable-frequency pump
分布式变频泵
以上为机器翻译结果，长、整句建议使用 人工翻译 。
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In the heat-supply system with distributed variable frequency pump, there exists a zero pressure difference, at which supply and return water pressures are equal.
分布式变频泵供热系统中存在零压差点，该点供回水压力相等。
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