执手操作带有悦动响声，开启手感顺畅，舒适。

Pleasant sounds will be heard when turning the handle around the opening positions, smoothly and comfortably.

Adopting three layers of seal structure design to enhance water tightness, air tightness, soundproof and heat-insulating performance.

Concealed internal drainage system, protected from wind pressure.

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

Glass uses gasket assembly process to improve installation efficiency and installation.

Double-layer large insulation thermal break bars remarkably reduce the heat transfer coefficient, and heat preservation is improved.

Standard 5G+12A+5G+12A+5G double insulating glass, enhances sound insulation.