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中央空調(diào)系統(tǒng)、冷卻塔及其管道
Central air - condition system and cooling tower and pipeline
空調(diào)風(fēng)管安裝
Air line of air-condition installed
安裝風(fēng)冷柜機(jī)
Installation wind cooling cabinet
大型冷水機(jī)組安裝
Installation of large cooling water unit