A WINDOWS SYSTEM OF USE FOR IMPROVED MATERIAL PROPETY AND GIVE A CONCURRENTLY OF CRIME PREVENTION AND SCREEN

摘要

The present invention relates to a window system having crime prevention and insect-proof functions and improved material properties to enable users to install an insect-proof window and a security grille on aggregates for the window frame of a window at the same time or to selectively attach or detach the insect-proof window and the security grille to or from the window; to improve the wind pressure resistance of the window by preventing the movement of the sash of the window; and to improve the airtightness, the watertightness, and the insulation performance of the window.