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book or notebook, book, or notebook covers or file and method for book or notebook decks or file to prepare
book or notebook, book, or notebook covers or file and method for book or notebook decks or file to prepare
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机译:书籍或笔记本,书籍或笔记本封面或文件以及书籍或笔记本甲板或文件的制备方法
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摘要
The invention relates to an insulation board (1), which is made of organic wood fiber pulp. According to the invention, the insulation board comprises a number of overlapping insulation board layers (2), which are made of some organic wood fiber pulp, such as heat fiberized wood fiber pulp or the like. The fiber length in the organic wood fiber pulp is within the range 1.0-5.0 mm, most advantageously 2.5-4.0 mm.
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