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Underground air ducts (Drying of Onions and Potatoes in bulk)

 

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Cross-cut of aeration system with ventilation towers.

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Product in bulk.
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Top view of storage room.
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Top view of pressure chamber with hatch control.
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Pressure room with wall made of pine boards.

 

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Pressure room with wall made of plywood and vertical beams.
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Pressure wall made of plywood and horizontal beams.
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Angular cross-cut of air ducts and pressure chamber.
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Alongside cross-cut of product, air ducts and pressure chambers.
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Cross section with air ducts under product.
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Air outlet opening with half-round duct.
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Half-round ducts.
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Pressure room for half-round ducts.
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Half-round ducts in the storage room.
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Retaining wall.
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Use of retaining wall in practice.
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Outside retraining wall.