FIELD: agriculture.
SUBSTANCE: pneumatic duct comprises the front, back and side walls. The supporting grid is adjusted with tilt from the front wall to the back wall. There are windows for the basic material receiving and for the processed grain material output. The side walls are vertically placed at the boost phase section of the pneumatic duct and are slantingdicularly placed at the transition phase and extension sections. The back side at the extension section is downwards offsetted with the transition phase section overlapping and forms the branch duct with the transition phase section.
EFFECT: grain material effective division.
1 dwg
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