| 摘要 |
Mixing apparatus, typically a tractor powered agricultural trailer for mixing and dispensing animal feedstuffs, has a main body in which a main mixing rotor rotates for agitating and stirring the material which it sweeps round lower part-cylindrical wall structure of the body and a lateral extension along an upper side of the main body having a feed out rotor therein for urging the material to and through a discharge door in said extension. The inboard side of the extension is open to the main part of the body and said wall structure includes a part bounding the bottom of the extension which can be moved angularly between a first position close to the envelope of revolution of the mixing rotor to deflect material from entering the extension during mixing and a second position at which it is remote from said envelope so that material is swept into the extension during discharge.
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