Trackless retractable door factory gates _-Sheng Industry (certified) _ YUCI retractable doors provide strong sung by Wanbailin area distribution of stainless steel products. Wanbailin district-Sheng Stainless Steel Products Distribution Division (www.sxqsmy.net) is specialized in the "garage doors, European doors, fire doors, stainless steel doors, engineering doors, building doors, retractable door" of the enterprise, the company adhering to the "integrity business, hard service "concept, to provide you with the highest quality products and services. Welcome to inquire! Contact: Weijing Li. Classification retractable door: A, are classified according to the primary timber: 1, 2 aluminum retractable doors, retractable stainless steel doors 3, power retractable door under normal circumstances iron is usually electric retractable door trackless retractable factory gates, under special circumstances diesel power. Press Run Category: 1, manually retractable door 2, electric retractable door: A, rail electric retractable door B, trackless electric retractable door (also known as smart trackless robot retractable door) Press Control System classification: 1-wire electric retractable door 2, full remote control electric retractable door 3, intelligent trackless retractable door because each robot manufacturers retractable door style, but also by the quality of the different types of styles into the design of this structure depends on the rail retractable door aluminum profiles Material , design and precision accuracy, strength, and material machining accuracy pulley, and whether the door hanging member can effectively reduce installation errors. It can explain why Europe, especially Germany, similar electric gate products more reliable. Because there's basic industries. In particular, the high average level of aluminum alloy.