1. This kind of pump dependence and atmosphere press, so promote aqueous height limited. 这种泵因为依赖与大气压，所以提升水的高度有限。
2. The sturdily constructed instrument optically measure specific gravity of aqueous solutions. 坚固结构光学仪器用于测量水溶液的比重。
3. The principle and application research of supercritical fluid extraction, aqueous tow phase extraction, and etc. new techniques is summarized. 概述了超临界流体萃取、双水相萃取等各种新型技术的原理和应用研究情况。
