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After the pulp is uniformly treated in the paper making process, because the pulp contains a large amount of water, it needs to be pressed to discharge the water during the forming process of the paper product. The combination roll is a commonly use dehydration part on the paper machine, and a large amount of water is evenly arranged on the surface. Hole, in the process of paper processing and production, it is necessary to use a combination roll to remove the moisture in the pulp. By opening a water absorption hole on the surface of the roll body, a large amount of water contained in the pulp can be absorbed during the paper making process. At the same time, the water absorption hole has an inverted trapezoidal structure with a wide upper and a narrow bottom, which can improve the dehydration efficiency. The connection between the roll body and the connecting shaft The operating side shaft head and plastic sealing plate are arranged at the place to ensure that the impurity in the pulp will not affect the transmission efficiency of the connecting shaft during the rotation of the roller body.