Because of saving space, good water-displacing characteristics and nice sealing function casement is widely used in England, Italy, Southeastern Asia and Southern China.

• 外平开窗因其节省室内空间的特点,又有较好的排水性能和良好的好密封果。故此被广泛应用于英国、意大利、东南亚及中国南方建筑。