petroleum fraction是什么意思 petroleum fraction怎么读
petroleum fraction的用法和样例
- Light petroleum distillate, generally known as naphtha, was the logical choice.
轻石油馏分，如石脑油是合乎逻辑的选择。 - A technique for measuring the corrosive sulfur in the petroleum fractions was introduced.
文章介绍了一种测定石油馏分中腐蚀性硫的方法。
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