... a variety of high performance buliding curtain wall,windows,doors,aluminum products,products mainly including:energy-saving curtain ... wood composited window,aluminum-wood composited door,metal and glass roof,lighting house,handrail,ceiling,partition,shutter,louver, ... and encironmental. *Multi-functions for opening:free folding,tri-sash folding,four-sash folding etc. which are convenient to slide. * ...