{
  "id": "UN146",
  "name": "barrel (petroleum U.S.)",
  "ml_name": "ip_bbl_{oil}",
  "symbol": "bbl",
  "reference": "https://www.nist.gov/pml/special-publication-811/nist-guide-si-appendix-b-conversion-factors/nist-guide-si-appendix-b8#B"
}