Результаты (
английский) 3:
[копия]Скопировано!
oil is a valuable hydrocarbon raw material. it is composed of carbon and hydrogen.various oil have different properties.the proportion of oil is the ratio of its value.hydrocarbons are widely used as fuel and raw materials for the petrochemical industry.
переводится, пожалуйста, подождите..
![](//ruimg.ilovetranslation.com/pic/loading_3.gif?v=b9814dd30c1d7c59_8619)