... up to 90%,2, runner boss and outer circle made from special aluminium with hard wear resistant material, long life ... -driven belt with special self-tensioning devices and mechanical belt lock,5,adopt thick aluminium foil and recovery heat with with the height ... (); oProductShow.init( { 'aImgSrc': aBigImageSrc } ); } )(); Rotary heat recovery equipment, with cooling, heating system, filter function