| 摘要 |
1. External supplementary window (3) which is mounted on bearings in sliding tracks on the outside of a building facade and depending on atmospheric conditions can be slid into place in front of a permanently built in conventional window. The supplementary window is characterized by the fact that when it is not in use, it can be slid on tracks into the interior compartment of a case-like structure consisting of a front side exposed to the elements and a back wall facing the building facade which in itself can be slid on sliding tracks in front of the window opening. |
