| 摘要 |
A metering device is described which provides for very accurate metering of granular material such as seeds or fertilizer. The device incorporates two main components: a solid casing having a slot with an open side and decreasing cross-section, and a corresponding rotor which frictionally urges material along the slot. The rotor has a resilient surface and can be in the shape of a disc or of a roller to correspond with the shape of the casing. The device allows significant savings in the spreading of granular material over conventional devices.
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