不锈钢伸缩门活动部位特点:伸缩门每个活动部位环节均采用不锈钢管，轴，轴瓦，不锈钢螺母，尼龙衬垫组装，组装时每个环节点加注高级润滑油，无噪音伸缩自如。
Features of movable parts of stainless steel expansion door: each movable part of the expansion door is assembled with stainless steel pipe, shaft, bearing bush, stainless steel nut and nylon pad. During assembly, each ring node is filled with high-grade lubricating oil, so it can stretch freely without noise.
铝合金电动伸缩门主体结构与不锈钢相似，也是利用平行四边形的运动原理，采用标准的铝合金型材直接用模具压制成型，然后通过镀锌管以及交叉连杆连接而成。与传统的不锈钢电动门相比，材质更优，造型更美观，更加耐腐蚀。
The main structure of the aluminum alloy electric telescopic door is similar to that of stainless steel. It is also made of standard aluminium alloy profile directly pressed by die, and then connected by galvanized tube and cross connecting rod by using the motion principle of parallelogram. Compared with the traditional stainless steel electric door, the material is better, the shape is more beautiful, and the corrosion resistance is better.