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　　D type water conservancy pulp machine changed the direction of the pulp streamline of the traditional circular pulp machine, so that the pulp always tends to the central direction, and improve the height of the central part of the pulp, at the same time, increase the number of pulp impingement on the impeller, improve the pulp dredge ability 30%.It is an ideal equipment for continuous or intermittent breaking of paddle board, damaged paper and waste paper in the paper industry.