Focuses On Building Energy Saving Door And Window Hardware In building energy saving, the role of doors and windows cannot be underestimated, and high-quality door and window hardware provides guarantee for high-quality doors and windows. Therefore, the role of door and window hardware in building e

The knowleage of Door and window hardware : how to adjust the closing force of door closer? Adjust the closing force of the door closer is also to adjust the closing speed, the force is large when the speed is fast, the force is small, the door closer closing speed is slow. Adjust the closing speed