twice pressing
... turtle oil 海龟油 twice pressing 二次压榨 Twichell process 特威切尔法 ...
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步骤包括木浆板分页、碱浸渍、压榨、疏 解分散、蒸煮、洗涤、除杂、漂白、二次洗涤、抄粕；
The invention comprises the following steps: wood pulp plate paging, alkali soaking, pressing, untwining and dispersion, cooking, washing, impurity removal, bleaching, a secondary washing and pulping;
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