*With smooth junction、firm connection and tidy assembly *Double-sealed insulating glass; *Sealed drain system with excellent anti-air and anti-water ability; *Varieties of opening ways and optional aeration effect; *carrying the “equal room ” theory obtain excellent heat-preservation、sound insulation and less-transfiguration ability *Be capable of producing the combined window、single window and one-unit window frame; *Be able to connect with all kinds of doors and make the series more perfect; *The slim frame make the window Obtain the large lighting area and with bright effec;as well as need less profile and be economy in actuary;