How to reduce the breakage rate of aluminum sheet metal box during processing?
1.The model, specifications and functions of the selected hardware fittings should conform to the national standards and relevant regulations,
and should match the selected plastic steel doors and windows,
2.Installation hardware application should be with fastening screw, the internal must be equipped with metal lining plate,
the thickness of the lining plate is greater than 2 times the fastener tooth spacing,
3.Hardware stamping should be regularly maintained after installation to prevent rust and erosion,
4.Door and window lock handles should be assembled after window frames are put into the frame.
Position must be accurate and switch should be flexible,
5.Double sliding pulley should be set for doors and windows with a width of more than one meter or double windows,
6.Stainless steel material for sliding support hinge,
7.Light open and light close during use,
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