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| сырьё С4, исходное сырьё бутадиен, сырьё бутадиен (Also known as butadiene feed or crude butadie ne – is a colourless gas (liquid under pressure) with a mild petroleum-like odour. It is an important petrochemical feedstock. Спиридонов Н.В.) | |||
| фракция C4 (sheetikoff); бутилен-бутадиеновая фракция (sheetikoff) | |||