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أ إ آ ا ب ت ث ج ح خ د ذ ر ز س ش ص ض ط ظ ع غ ف ق ك ل م ن ه و ي
Showing results 2 to 2 of 2 < previous 
Issue DateTitleAuthor(s)
2017Drain waste heat recovery system that saves hot drain water by means of a helical rectangular coil heat exchangerHourany, Elie Al; Hallak, Joe