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The application for the ventilation of the frames of the transport of a device constituted by two fixed plates with perforations are offset and of a rotary disk for or preventing the passage of air through the orifices of the fixed plates
The application for the ventilation of the frames of the transport of a device constituted by two fixed plates with perforations are offset and of a rotary disk for or preventing the passage of air through the orifices of the fixed plates