| 英文同义词: | Gases (petroleum), depropanizer bottoms fractionation off;Gases (petroleum), depropanizer bottoms fractionation off Petroleum gas [A complex combination of hydrocarbons obtained from the fractionation of depropanizer bottoms. It consists predominantly of butane, isobutane and butadiene.];hydrocarbons C4, depropaniser bottoms fractionator |