青云翻译

[object Object]

Ethylene is the basic raw materials of petroleum chemical industry, ethylene production of high and low to assess an important symbol of national petroleum and chemical industry development level.

The ethylene is photochemistry industry basic raw material, the ethylene output height is weighs a country photochemistry industrial development level the important symbol.

Vinyl is the petrochemical industry, the basic raw materials of ethylene production is one measure of a State level important indication of the development level of the petrochemical industry.

Ethylene is the basic raw materials of petroleum chemical industry, ethylene production of high and low to assess an important symbol of national petroleum and chemical industry development level.