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D21B—FIBROUS RAW MATERIALS OR THEIR MECHANICAL TREATMENT
D21B1/00—Fibrous raw materials or their mechanical treatment
D21B1/04—Fibrous raw materials or their mechanical treatment by dividing raw materials into small particles, e.g. fibres
D21B1/12—Fibrous raw materials or their mechanical treatment by dividing raw materials into small particles, e.g. fibres by wet methods, by the use of steam
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Engineering & Computer Science
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Life Sciences & Earth Sciences
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Wood Science & Technology
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Mechanical Engineering
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NL1732A1912-01-261912-12-13
Method and apparatus for preparing paper pulp
NL765C
(en)