both to increase the indoor lighting

Sliding window is simple, beautiful, safe, reliable, long life, open in a plane, take up less space, easy to install the screen window Wait. Currently using the most is the sliding window. The disadvantage is that two windows can not be opened at the same time, can only open up half of the ventilation is relatively poor; sometimes the sealing is also slightly worse. Sliding window: points around, up and down two kinds of push and pull. Sliding windows do not occupy the advantages of indoor space, beautiful appearance, price economy, good sealing. Using high-grade slide, gently push, open flexible. Coupled with large pieces of glass, both to increase the indoor lighting, but also improve the overall shape of the building. Slippers of the force state is good, not easy to damage, but the ventilation area by a certain limit.