The testing methods for total nitrogen and the denitrogenation technologies such as acid refining,solvent refining were also reviewed. 综述了酸精制、溶剂精制等脱除石油产品中氮及各种总氮的测定方法。
According to practical production, some related work of remaking sealing components of import suphuric acid refine device are introduced. 从生产实际出发，介绍了国外引进硫酸精制装置玻璃管路密封件国产化改造的相关工作.
The transformation on sealing components of glass pipeline in import sulphuric acid refine device from abroad and sealing structures of the imported high pressure plunger pump is introduced. 介绍了引进硫酸精制装置中玻璃管路密封件以及高压柱塞泵密封结构的改造。
He gave me a taste of his acid wit. 他让我尝到了他敏锐尖刻之机智的滋味。
Acid irritates the stomach lining. 酸能刺激胃黏膜。
Acid had pitted the surface of the silver. 酸把银器的表面腐蚀了。