| 摘要 |
<p>The swivelling or tilting window has top and corner fittings arranged to be concealed. The window consists of a frame and leaf which can be tilted while rotating around a fulcrum positioned on the bottom horizontal leg of the leaf. The swivelling operation of the window is achieved by fittings mounted on one of the vertical legs of the leaf. It consists of a corner fitting assembly containing elements which can perform relative tilting and swivelling movements and a top fitting assembly with swivelling parts, which are disengageable from each other. The top fittings including the leaf mounted fitting part forming part of the corner fitting assembly is mounted, concealed in the upper portion of the leaf overlap.</p> |
