main and by-product production的意思|示意

Production theory and processes of modified urea-formaldehyde resin used in oil well water shutoff and some influence on product performance resulted by main factor in the production are introduced.

介绍了适用于油田油井堵水用的改性脲醛树脂的生产原理和工艺，以及生产中的关键因素对产品性能的影响。

The main content of the existing product produced by a production process of paratoluenesulfonic acid does not exceed 97 percent and cannot meet the requirement of pharmaceutical synthesis.

现有的对甲苯磺酸的生产工 艺生产出的产品，主含量不超过97％，不能满足一些医药合成的需要。

The industrial cluster mode already became main production mode in these enterprises, in result they have reduced the product cost and improve productive efficiency by industrial advantage.

它们通过采用产业集群化的生产模式，发挥整体行业的产业优势，大大降低了产品成本，提高了产品的生产效率。