The casement window has a simple structure, a large opening area and good ventilation. The hardware and handles around the window sash can be operated indoors. Good airtightness, excellent sound insulation, heat preservation and impermeability. The inward
The steel-plastic composite geogrid is made of high-strength steel wire wrapped by high-density polyethylene into a high-strength strip, formed by plane warp and weft at right angles, and formed by ultrasonic welding.