The marketing methods of system door and window manufacturers around the country are almost the same, especially in such a highly competitive market. Their support to dealers is also very similar. Some of them are applicable, while others are basically just frills, such as free sample delivery, and the demand is high

The doors and windows of aluminum alloy system are profiles that will be treated externally. The door and window frame components are made by blanking, punching, grooving, tapping, window making and other processing processes, and then assembled together with connectors, seals, opening and closing hardware. aluminium alloy

1、 Aluminum alloy Understand the first step of high-end aluminum alloy system doors and windows, first understand the type of aluminum alloy, and distinguish the difference between ordinary aluminum alloy and bridge cutoff aluminum alloy. Ordinary aluminum alloy does not have heat insulation strips, but is just pasted on the surface, without heat insulation