伸缩门安装的先决条件一是地面必须水平，
The first prerequisite for the installation of the telescopic door is that the ground must be horizontal,
这里的水平不是肉眼可见的水平。地面的小坑、凸起，不容易发现的崎岖路面，会使电动伸缩门的轮子磨损过度，伸缩门交叉材料容易弯折变形，造成伸缩门使用寿命不长，后期易维修更换。所以伸缩门安装前必须保证路面用水泥抹平。二是伸缩门安装前必须接通电源。伸缩门安装时需要使用电锤。安装后需要通电试运行，检查运行情况。提前通好电源，保证后期安装工作正常进行。
The level here is not visible to the naked eye. Small pits and bulges on the ground and rugged roads that are not easy to find will cause excessive wear on the wheels of the electric telescopic door, and the cross materials of the telescopic door are easy to bend and deform, resulting in short service life of the telescopic door and easy maintenance and replacement in the later stage. Therefore, the pavement must be leveled with cement before the installation of the telescopic door. Second, the power supply must be connected before the installation of the telescopic door. Electric hammer is required for the installation of telescopic door. After installation, power on test run is required to check the operation. The power supply shall be installed in advance to ensure normal operation in the later stage.