| 摘要 |
A device includes a rotary seal (10) with two discrete channels (28, 30), each of which has an inlet and an outlet (28A, 28B). The outlets are provided in the same surface (10B) of said seal (10) in a spaced arrangement, so that the seal is capable of adopting a rest position in which the two outlets are closed by a sealing member (20) and two respective dispensing positions in which the outlet of either one of the channel faces a dispensing aperture (21) in the sealing member. From the rest position thereof, said seal is moved to the respective dispensing positions by being rotated in opposite directions, and, from a dispensing position, it is moved back to the rest position thereof. |
