伐木工人和矿工都不能省略，至多却不比工厂里的化学家和油田里的工人更重要——石蜡是石油的副产品。
Neither the miner nor the logger can be dispensed with, any more than can the chemist at the factory or the worker in the oil field -- paraffin being a by-product of petroleum.
在石油开采和输送过程中由于石蜡沉积造成的经济损失每年达数十亿美元。
Economic loss due to wax precipitation in oil exploitation and transportation has reached several billion dollars per year recently.
这些曲线及数据不仅对石油醚和液体石蜡的组成和使用性能有参考价值，而且这种分析方法为煤液化油的实沸点蒸馏奠定了基础。
These curves and datas are of great use to compositions and function of petroleum ether and liquid paraffin, this analytical method is based on TBP distillation of coal liquefied oil.
应用推荐