| 摘要 |
<p>A window construction comprises an outer frame (1) which can be mounted in a casing (3) by means of hinges (2) to swing on a substantially vertical axis, and a number of inner frames (4,5) which are arranged to slide back and forth within the outer frame (1). The outer frame (1) is made of steel or a material with which an approximately equal rigidity can be obtained in the window construction. The outer frame (1) is formed by a U-section, each of the legs of which U-section defines the plane in which an inner frame (4,5) is slidable, and with a preposition which depends on the dimensions and the weight of the window construction. <IMAGE></p> |
