| 摘要 |
Vent characterised in that the flap includes two planes offset by a shoulder, the said shoulder being articulated by bearing on a transverse annular internal structure or shape, bead 10 in the form of a rib or the like exhibited by the body 2 of the sleeve carrying the said flap. This invention is of interest to industries and manufacturers of ventilation and air conditioning outlets. <IMAGE>
|
