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https://articlescad.com/is-dou....ble-glazed-window-ha
Types of Double Glazed Windows Handles UPVC window handles play an important part in the process of double glazing. They are used to control the locking of the window, and also ensure it seals properly, helping to improve the efficiency of energy. Espag window handles have seven millimeter square spindles that connects to the frame with the multi-point locking system. Both inline and
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