框扇结构采用销钉+注胶工艺，增加结构强度，承重力强。

Connecting structures are sealed with structural sealant+ dowel technology, ensuring structural strength and high bearing capacity.

Bottom sealing gasket design, sealed continuously without breakpoint.

Shoot bolt is activated when handle is turned upward and remains in function when the handle is returned to the original position.

The outer handle is fixed and can't operate.

The insulating aluminum strip is coated by fluorocarbon to avoid changes in the surface of the aluminum strip for a long time.

Standard 5G+20A+5G insulating glass.