• Beer holders: Abbr.
• Crude containers (abbr.)
• Crude meas.
• Crude qty.
• Ener.-related units
• Large liq. containers
• Middle East meas.
• Oil meas.
• Oil qty.
• Oil quantities: Abbr.
• OPEC amounts
• OPEC amounts, briefly
• OPEC amts.
• OPEC output
• OPEC quantities
• OPEC units
• OPEC units: Abbr.
• Wooden containers: Abbr.