API gravity
美国石油学会重力指标；美制比重；重度
例句
1.standard test method for api gravity of crude petroleum and petroleum products hydrometer method
原油和石油产品api比重的标准试验方法
2.The theory that the API gravity of oil increases (specific gravity decreases) as the carbon ratio of coals in the same area increases.
在同一地区内，由于煤的碳比增加，油的API重度增加（即比重降低）。
3.Test Method for API Gravity of Crude Petroleum and Petroleum Products (Hydrometer Method)
原油和石油产品API比重的试验方法（液体比重计法）
4.The higher the API gravity number, the richer the yield in premium refined products.
API重力值越高，可提炼越多的高级精炼油品。
5.Test Method for Density, Relative Density and API Gravity of Crude Petroleum and Liquid Petroleum Products by Thermohydrometer Method
用温差比重计法测定原有和液化石油产品的密度、相对密度和API重量的试验方法
