1.The double-chamber window frame improves the heat preservation and sound insulation of FRP shape.
2. The drainage chamber is designed outward and separated from other chambers, avoiding mutual penetration.
3. Keeping the bottom design of original series 58, it is suitable for equipping with varieties of joint sections.
4. The metal installment groove fits for CAM locks and needle pulleys.
5.Through adjustment of the FRP press bars, single glass and double-vacuum glass can be installed and enable the glass to be installed always inside,facilitating installment and maintenance.
6. The aluminum alloy tracks of window sash and screen sash are easy to replace, prolonging the longevity.
7.Together with the gross bar, the connecting part of the two splits adopts plane-sealing structure, which enhances the window's performance of air-tightness and waterproof.
8.The sealing bars inside the window screen can be adjusted, so mosquitoes can't enter the room even when windows are open.
9. Reasonable section design increase its utilization rate, reducing the window cost.

