| 摘要 |
The unit consists of a housing (20) with an intake (18), two or more outlets (56), and a distributor in the form of a rotary drum shutter (60) with a cylindrical wall (62) controlling one or more of the outlets and a length of film (80), made from a supple plastic material, attached to the drum and controlling another outlet. The shutter wall and film also have apertures for opening the outlets.
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