| 摘要 |
FIELD: heating.SUBSTANCE: claimed system has at least one section. Every said section comprises lengthwise front side, two parallel crosswise asides arranged perpendicular to said front side to define the crosswise direction and rear side parallel with said front side. Every section comprises stepped rail channel of the front side. Said rail channel has two slide guides shifted relative to each other horizontally and vertically. Stepped rail channel of rear side is arranged in mirror symmetry with said front side channel. There are also two mirror-symmetric crosswise rail channels. Said rail channels have two slide guides shifted relative to each other horizontally and vertically. Vertical shift of crosswise rail channel slide guides is identical to vertical shift of front and rear side rail channel slide guides. It comprises also at least one pair of sliding flaps. Top flap rests on two top slide guides while bottom flaps rests on two bottom guides at sliding. Both sliding flaps can displace, given the pull-out design, in crosswise direction and, given the lateral design, they displace in lengthwise direction between the opening and closing positions and can displace one over the other at opening position.EFFECT: minimised quantity of structural elements.11 cl, 6 dwg |
