Barrel (US, petrol) is an American unit of capacity usually employed in the petroleum industry and trading in fuels (barell = 158.987 294 9 L).
Generalic, Eni. "Barrel." Croatian-English Chemistry Dictionary & Glossary. 29 June 2022. KTF-Split. 1 Apr. 2025. <https://glossary.periodni.com>.
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