东丽区卷帘门安装设计   厂家服务

东丽区卷帘门安装设计，厂家服务，15222582525//13389916837，
On the top lift door, the spring on each side is hung in the slot. Move the spring hook to the adjacent slot to adjust its elastic force. On the rolling shutter door, the spring on each side is controlled by the spring cable on the pulley. In order to adjust the spring force, please lengthen the cable passing through the flat plate above the door, and then re knot at the end to maintain the new spring force.