| 摘要 |
The top of the walls 1 is covered by a framework made of angle-bars 5 having an essentially horizontal wing which bears on one longitudinal side of the frame a T-shaped profile 9 fixed in an oblique position while the leaf 7 comprises a framework made of angle-bars 8 having one upright wing, at the top of which is an outwardly directed T-shaped profile 13 which covers and contains the oblique T-shaped profile 9, these profiles playing the role of a hinge which makes possible the opening of the frame and of slides making possible the longitudinal sliding of the leaf. <IMAGE>
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