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 copperplatepaper as an example.
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。
2
In copper engravings and etchings, the impression caused by the edges of the plate is clearly visible on the paper.
铜版画、雕刻，造成这样的印象是优势明显的板块文件。
3
The utility model relates to an epoxy paper glass cloth double-faced copper-clad plate, which is applied to the basic materials of different electronic devices, instruments and circuit boards.