What is the difference between system doors and windows and broken bridge aluminum?

The raw materials are different: some brands of aluminum are used in the system doors and windows, and some miscellaneous brands used in the broken bridge aluminum doors and windows are synthesized from some brand materials.

The manufacturing process is different: the system doors and windows need to be glued, and the broken bridge doors and windows are all made by machinery, and there is no need to glue at all.

Different accessories: the hardware accessories of the system doors and windows are basically German, and the hardware accessories of the broken bridge doors and windows are some miscellaneous hardware or domestic hardware.