1·Three conventional methods for measurement of petroleum density are described in the present paper. They are pycnometer method, hydrometer method and digital densimeter method.
本文介绍了三种测定石油密度的方法，传统的密度计法和密度瓶法及现代的数字密度计法。
2·Shale (mudstone) densimeter is a special instrument used to measure shale (mudstone) density during drilling in geological exploration for oil and gas.
页(泥)岩密度计是石油及天然气地质勘探中现场随钻测量页(泥)岩密度的专用计量器具。
3·A simple, modified magnetic float densimeter that can be used to determine the density of solution is described and the factors that influence its precision and accuracy are discussed in detail.
本文介绍了一种改进的、原理简单的溶液密度测量装置——磁浮密度计，讨论了影响精密度和准确度的因素。
4·The working principle of the vibration-type water mud densimeter is dis-cussed in our paper. It guided the design of the variator and the secondary meter.
本文分析了振动式水泥浆密度计的原理，指导了变送器和二次仪表的设计。
5·The relation between the optics density of the X ray and the output information voltage of micro densimeter is investigated.
探索了X射线照片密度与显微密度计信号电压之间的关系。