| 摘要 |
<p>1. Composite distribution ducting, essentially made up of modular elements (1 and 2) closable at the front by means of snap-on covers (1' and 2'), and of an element (6) for covering the upper modular element (1 or 2), characterised in that the sides of the modular elements (1 and 2) are attached to one another by connecting clips (3) and co-operate with fixing members (4 and 5) consisting, in each case, of a groove (4) of trapezoidal or other cross section in the upper and lower sides of the elements (1 and 2), this groove being partially closed by a rim (4') projecting from the connecting portions of said sides, and of a U-shaped profile (5) with unequal arms, of which the shorter arm (5') extends the free portion of the sides and of which the longer arm (5") is turned toward the internal portion of the element (1 or 2) and has a longitudinal projection (7) in the region where it is joined to the core of the U-shaped profile (5).</p> |
