| 摘要 |
Metering apparatus in which granular material from separate sources can be mixed in predetermined proportion. The device includes a delivery cylinder having a plurality of material carrying receptacles formed in its outer face which rotates within a stationary sleeve. Circumferentially aligned inlets and outlets in the sleeve define paths of travel for the granular material, the axial width of each path being variable by selective positioning of a cylindrical band member which rotates with the delivery member and is axially slidable thereon.
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