| 摘要 |
A system window is provided to improve ventilation efficiency by applying awning to a first switching window and by applying tilt and turn to a second switching window. A system window is composed of several switching windows(100) and a fixed window(200). The switching window is composed of a first switching window(120) installed at the outside to be opened to the outside, and a second switching window(130) installed at the inside to be opened to the inside. The constant space is formed between the first switching window and the second switching window. Awning is applied to the e first switching window, and tilt and turn is applied to the second switching window. |
