High quality aluminum windows, aluminum profile, thickness, strength and oxide film, etc., should comply with the relevant national standards, the wall thickness should be more than 1.2 mm, the tensile strength reached 157 per square meter of Newton, yield strength to reach 108 Newton per square millimeter, the oxide film thickness should reach 10 microns.
If not up to the above standard, is the poor quality aluminum alloy doors and windows, is not available.
Aluminum window machine can make this well, and save more time.
