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https://discovery.fiu.edu/display/pub120270 Evaluation of optimal dual axis concentrated photovoltaic thermal system with active ventilation... dual axisactive ventilationevaluationoptimalconcentrated https://eureka.patsnap.com/patent-US20160029740A1 Shoe Having Active Air Ventilation - Eureka | Patsnap The invention relates to a shoe, comprising a sole construction, which has an upper sole part and a lower outsole part and an air-pumping device having a... active airshoeventilationeureka