energy conservation, noise insulation,excellent designed structure,reasonable price, elegant appearance 1.Adopt 14.8 mm Heat insulation Strip;2.Suitable for the area with high performance heat preservation, heat insulation;3.Sash width ≥300mm;Sash height≤2400mm;Weight of window sash ≤250kg;4.Side frame, follow the procedure of glue injection after corner crimping;Leading the flow of Sealant ...