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Terms for subject Refrigeration containing 上行 | all forms | in specified order only
ChineseEnglish
上行下给式蒸汽重力供暖系统steam heating down-feed gravity system
下行上给式供暖系统upfeed heating system
下行上给式蒸汽供暖系统steam heating up-feed system
双管上行下给式热水供暖系统two-pipe hot water down feed system

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