... battery supply circuit 蓄电池供电电路 closed supply circuit 闭式供应系统 multifrequency supply circuit 多频电源电路 ...
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闭式热水供应系统 closed scheme of hot-water supply
闭式供应系统
Closed supply system
以上为机器翻译结果，长、整句建议使用 人工翻译 。
变频调速技术应用于建筑热水供应系统时，该热水系统为闭式。
When the technique of regulating speed with frequency conversion is applied to the hot water system in construction the system should be sealed.
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