发布人：http://www.kdjlm.com 发布时间：2017-11-09 18:02:12
A garage door, open the door the door began to flow into the China locomotive was first imported, domestic installation and customer service service. With the maturity of production technology, domestic manufacturers can fully produce and export independently. According to statistics, there are more than 50 manufacturers of door opener in china.
Two, selection of manufacturers currently do garage door dealers a lot, competition is very fierce, because the customer's choice, installation requirements worry free, after sale must be guaranteed, so must pay attention to brand.
Three, door panels and hardware accessories door quality is mainly divided into two parts: first, stability. The traditional white color steel plate is popular in the market, and its stability is better. It is simple and generous. Two is the degree of tightness. Three accessories. The overall tightness of all parts of it, it will be through the connecting angle of each parts to form a whole, torsion spring it is one of the key components of the garage door, door weight depends largely on the torsion spring. How wide and high the door is, how long and how long the torsion spring is.
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