| 摘要 |
<p>Insulated window frame has an exterior frame of reinforced concrete, single or double glazing resting on a bed of foamed polystyrene, and an inner frame of concrete or other material. The side faces of the frame have steel brackets for solid fixing to the masonry and the top face has U-shaped handling brackets. Pref. the sill of the frame has a water drip groove underneath, the exterior lintel is lightened by recessed grooves and the exterior jambs are lightened by cylindrical holes.</p> |
