The function of pvc door window is good insulation,watertight,wind resistance and anti-thief.
Check production: production equipment and technology determine whether the overall performance of doors and windows is good.
According to the requirements of the national standard, the diagonal difference of upvc casement windows price should be controlled within 2-3 millimeters. There are strict process parameters and control ranges, which require certain production equipment and processes as guarantees, and a highly qualified workforce.
Therefore, the quality of upvcdoors and windows produced by street workshops and regular manufacturers is worlds apart.
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