heavy crude造句

1、The heavy crude production in China has increased constantly in recent years.
近年来我国重质原油产量不断增加。

2、Rheological property of heavy crude with high viscosity in east area of Gudao oilfield is studied.
对孤岛油田东区重质高粘原油渗流流变性进行了研究。

3、But Iran's oil is heavy crude and we have only one heavy crude refinery in our country.
但是，伊朗的石油是重质原油和我们只有一个重质原油的炼油厂在我国。