API比重
Sign in to saveAlso known as American Petroleum Institute gravity
measure of how heavy or light a petroleum liquid is compared to water
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Article · 中文
API用来表示石油流体相对于水的比重，定义为，其中是时油的值。 液体的值，定义为同一温度和压力下液体密度与水的密度之比。 若API大于10，石油液体密度小于水。正常情况下大多数石油流体API值介于10到70之间。
Abstract from DBpedia / Wikipedia · CC BY-SA
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