What inspection items does Shenzhen's aluminum alloy processing plant have?

1. Appearance quality: mainly by checking whether the appearance of doors and windows is complete and whether there is damage or not. 2. Size deviation: check whether there is any deviation in the size of the doors and windows, whether there is any size inconsistency, and whether there is any deviation between the size and the design. 3. The fit of the glass and the notch: Check whether the glass and the notch are fit in accordance with the regulations, 　　 4. Wind pressure resistance: Check the wind pressure resistance of aluminum alloy doors and windows. Generally, the wind pressure resistance must be above level 3. 5. Detection of water tightness: check whether the doors and windows are water permeable, 　　 6. Detect air tightness: check whether the doors and windows can pass through air and other gases, 　　 7. Opening and closing force: see whether the doors and windows are opened and closed normally.　　 8. Repeated opening and closing performance type inspection: doors and windows need to be opened and closed repeatedly during use, so repeated opening and closing inspections are required.