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structure, can be designed into a multi slot form, greatly reducing the equipment investment. Turning work can be
divided into the spiral stirring cage and two drum type, with high bulk materials, plant covers an area of small, low
fermentation cost, turning completely without dead angle, fully fermenting etc.. Turning machine in the forward or
backward at the same time, by rotating the spiral body, let the organic material from the bottom up lifting, turning
back, to exchange oxygen, temperature, water vapor effect.
