API MPMS 9.1-2012
石油測量標(biāo)準(zhǔn)手冊第 9.1 章 用比重計法測定原油和液態(tài)石油產(chǎn)品的密度 相對密度 或 API 比重的標(biāo)準(zhǔn)測試方法(第三版)
Manual of Petroleum Measurement Standards Chapter 9.1 - Standard Test Method for Density@ Relative Density@ or API Gravity of Crude Petroleum and Liquid Petroleum Products by Hydrometer Method (Third Edition)