纸是在造纸厂生产的。
根据生产实践经验，以铜版纸生产为例，介绍了造纸企业生产原料最佳库存量的数学模型及其应用。
Based on the production practice, the mathematical model of the optimum stock of raw materials in paper making enterprises and its application are introduced with copper plate paper as an example.
造纸工业生产中，抄纸过程是一个多变量耦合过程，并且有很大的死区时滞。
In paper making industry, Paper making process is a multivariable coupling process with large time-delay.
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