Bridge aluminum doors and windows to avoid scratching the surface of what? Bridge aluminum doors and windows are often used in building more prominent place, once scratched steel doors and windows, even if the bridge does not affect the performance of aluminum can also damage the overall appearance doors and windows. Common causes of scratching the surface of aluminum doors and windows broken bridge include: mechanical scratches and man-made scratches. 1. From the surface of the concave scratch is due to mold sticky foreign matter or air knife at rough machining generated. 2. scratches appear in the corner of projection products, is due to cracks produced by extrusion die 3. The transverse scratches or scratches mainly due to the introduction of products from sliding laterally transported to the finished product when sawing units, cooling bed has a hard projecting to the article scratch. Also some scratches produced in the loading, transport, and scratches are common during aluminum extrusion surface defects. Aluminum doors and windows broken bridge color composition structure is a combination of a green wooden windows, behind bars. Solid security doors steel window, steel doors in common thermal insulation is composed of two different sections through a combination of energy-saving insulating bars, energy bars, also known as nylon strips insulation aluminum doors and windows prices, its main role is to play a heat transfer intermediate cold quickly passed off to prevent or slow the heat transfer function. Its complex structure than ordinary aluminum doors and windows aluminum clad wood windows and doors, high cost, common Cailv not have insulation strips, not heat the surface do not just paste saving treatment. Aluminum clad wood windows and doors, windows and doors still Xi'an (online consultation), provided by the Xi'an Xianyang doors Door yet. Xi'an is still Door (www.sxzsmc.com) is Xi'an, steel leaders, over the years, the company implement the scientific management, innovation and development, the principle of honesty and trustworthiness, and satisfy customer needs. Xi'an is still leading in the door with the staff warmly welcome all inquiries negotiations to create Xi'an doors still a better future.