The bi-folding doors deliver natural light and harness passive cooling breezes when open and security when closed.
双折门提供自然光，打开时利用被动降温的微风，关闭时保障安全。
2
Wall cutting and unloading is a task of top priority of comprehensive harness in the north slope of Jinduicheng open pit stope. The vibration by blasting influenced the stability of slope.