求翻译：第一， 最主要原因是由于国产纸板的纸浆来源不稳定产生的。我国国内没有合适的长纤维的针叶浆。国产纸板制造企业无一例外均需从国外购买纸浆重新打浆再造，因而对浆源很难控制。这与美国造纸企业林浆纸一体化控制，直接使用湿浆制造纸板的工艺还是有相当大的差别的。是什么意思？

First, the most important reason is generated due to the unstable sources of domestic cardboard pulp. China's domestic no suitable coniferous long fiber pulp. Domestic paperboard manufacturing enterprise, without exception, are required to purchase pulp from abroad re beating reengineering, and ther

First of all, * The most important reason is because the pulp produced an unstable source. My domestic does not have the appropriate needle for long-fiber pulp. homemade cardboard manufacturing companies from abroad are required to purchase recycled paper pulp to a pulp slurry, and the source is ver

First, The most primary cause is because the domestically produced cardboard paper pulp originates produces not stably.Our country domestic not appropriate long textile fiber needle thick liquid.The domestically produced cardboard manufacture enterprise exists not one exception must from the oversea

First, the main reason is due to the homemade cardboard pulp sources of instability. China does not have the right kind of needles of long-fiber pulp. Homemade cardboard manufacturing company from abroad without exception are required to buy pulp beating recycled again, so the plasma source is diffi

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