It is a type of plastic that is made from ethylene (found in crude oil) and chlorine (found in regular salt).
它是一种塑料，由乙烯(原油中提炼)和氯(粗盐的成分)。
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Using Changqing and Qinghai waxy crude oils as research objects, the depressive effects of ethylene-vinyl acetate (EVA) copolymer pour point depressant on the waxy crude oils were studied.
The companies cut down more than 30% of energy consumption per unit of production of alumina, ethylene and caustic soda, and over 10% for crude-oil processing, electrolytic aluminum and cement.