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Process of making rubber-like material
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Process of solidifying and toughening oils.
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一种用于无纺布的纤维素纤维及制备方法
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Verfahren zur Herstellung von Kunstfaeden, Films, plastischen Massen usw
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Procédé de fabrication de cuir artificiel.
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Verfahren zur Herstellung von Formkörpern aus Fasern einem Bindemittel
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