1. Lightweight opening, aluminum alloy doors and windows want a long service life, violent switching is not desirable. Even if Xingbaihui doors and windows and hardware accessories have undergone tens of thousands of opening tests, violent switches are inevitable, which will affect the life of doors and windows. 
2. Regularly check accessories to eliminate hidden dangers, accessories determine the service life of doors and windows. Xingbaihui doors and windows use high-quality hardware accessories to strictly guard against your safety. What other daily maintenance points do you know? Welcome to leave a message in the comment area.
