| 摘要 |
<p>A pneumatic dispenser with compound metering discs, includes: a casing provided with an dispenser shaft(l?) and accessories, a metering disc(6) for variable seeds and an assistant disc(5) mounted to the shaft(l?), the said metering disc(6) has a group of concentric circles(12), there are 2-20 groups of feeding holes in the circles(12), the said assistant disc(5) has a group of suction holes, the feeding holes in the metering disc(6) are of the same sizes in each of the groups. In using, the dispenser can be adapt to different sizes seeds or different seeding space only by adjusting the relative position between the groups of feeding holes and the suction holes. The said dispenser can be mounted on a precision seeder.</p> |
