--Produced by wooden, with firm connection and tidy assembly; -Double-sealed insulating glass and the air thickness between glasses can be variety; -Sealed drain system with excellent airproof and waterproof ability; -Varieties of opening ways and aeration effect; -The glass can be taken down easily at room, which make the maintenance and glass-change convenient; -Carrying the í¦equal size roomí¦ theory has excellent heat-preservation, sound insulation and less-transfiguration ability.
