Design of watertight performance of doors and windows:  

 aluminium sliding window design, watertight performance and the strength of the aluminum alloy doors and windows bar, strip profile and window material, drainage system, structure design and so on, the strip has been used in recent years EPDM, can guarantee the good elasticity and anti-aging properties, but have glue sealing glass tank leakage of rain will still go in, so to milling groove, drain holes.