DS/EN ISO 3838:2004 原油和液態(tài)或固態(tài)石油產(chǎn)品 密度或相對密度的測定 毛細(xì)管塞式比重瓶法和帶刻度的雙毛細(xì)管比重瓶法
Crude petroleum and liquid or solid petroleum products - Determination of density or relative density - Capillary-stoppered pyknometer and graduated bicapillary pyknometer methods