General number used for double - double - roll paper road web offset.
凡是多用于独纸卷独纸路卷筒纸胶印机上.
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Double roll double unit can be equipped with a heavy roller.
独辊独卷安拆上可配备一不梢不沉辊.
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Double - roll squeezer is mainly used for extraction of the highly active black liquor of the pulp.
双辊挤浆机,主要用于对纸浆高效黑液的提取.
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