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。
This paper offers a hydrometer method for determining size distribution of ultra-fine particle in coal water slurry and discusses its mechanism, operation procedures and date calculation.
提出了水煤浆中超微细颗粒粒度的比重计检测方法；
This paper offers a hydrometer method for determining size distribution of ultra-fine particle in coal water slurry and discusses its mechanism, operation procedures and date calculation.
提出了水煤浆中超微细颗粒粒度的比重计检测方法；
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