1. The window with the handle cannot be closed. It is necessary to check whether there is any obstruction in the gap of the window. Sometimes it is because something obstructed accidentally when closing the window, which leads to the failure to close, but it is not very big. The problem, we just nee

1. Take necessary protective measuresThe door lock expands and contracts smoothly due to thermal expansion and contraction, especially in winter, when the seasons change, the weather changes obviously, and the temperature difference between indoor and outdoor is large, so protective measures should

1. If the handle of the aluminum alloy window is damaged, then you should first check in detail whether the window handle is loose or cannot be pulled. There is usually a back cover behind the window handle, as long as the back cover is opened, you can see the Phillips screws inside. When opening th