| 摘要 |
The invention relates to a device for the automatic opening and closing of doors or gates with two leaves, which is characterised in that it uses glycol-containing water as a single control fluid and in that it comprises, in combination: a) a low-pressure central pressure and control unit 1; and b) two pneumatic jacks 6 and 7 intended for opening and closing the two leaves 10 and 11; c) conduits 12 and 13 connecting the central unit to the jacks and made of plastic. <IMAGE> |
