{"data":{"id":"us/40-cfr-86.403-78","jurisdiction":"us","citation":"40 CFR 86.403-78","heading":"-78 Abbreviations.","body":"The abbreviations used in this subpart have the following meanings in both capital and lowercase:\nASTM—American Society for Testing and Materials.\nC—Celsius.\ncc—Cubic centimetre(s).\ncfh—Cubic feet per hour.\ncfm—Cubic feet per minute.\nCH4 methane.\ncm—Centimetre(s).\nCO—Carbon monoxide.\nCO2—Carbon dioxide.\nConc—Concentration.\ncu.—Cubic.\nCVS—Constant volume sampler.\nEGR—Exhaust gas recirculation.\nEP—End point.\nEPA—Environmental Protection Agency.\nF—Fahrenheit.\nh—hour.\nHC—Hydrocarbon(s).\nHg—Mercury.\nH2O—Water.\nin.—Inch(es).\nK—Kelvin.\nkg—Kilogram(s).\nkm—Kilometre(s).\nkpa—Kilopascals.\nlb—Pound(s).\nm—Metre(s).\nmph—Miles per hour.\nmm—Millimetre(s).\nN2—Nitrogen.\nN2O nitrous oxide.\nNOX—Oxides of nitrogen.\nNo.—Number.\nO2—Oxygen.\nPa—Pascal(s).\nPb—lead.\nppm—Parts per million by volume.\npsi—Pounds per square inch.\npsig—Pounds per square inch gauge.\nR—Rankine.\nrpm—Revolutions per minute.\nwt—Weight.\n°—Degree(s).\n%—Percent.","path":["Title 40—Protection of Environment","CHAPTER I—ENVIRONMENTAL PROTECTION AGENCY","SUBCHAPTER C—AIR PROGRAMS","PART 86—CONTROL OF EMISSIONS FROM NEW AND IN-USE HIGHWAY VEHICLES AND ENGINES","Subpart E—Emission Regulations for 1978 and Later New Motorcycles, General Provisions"],"source_url":"https://www.ecfr.gov/api/versioner/v1/full/2026-08-25/title-40.xml","current_through":"2026-08-25","vintage":"","retrieved_at":"2026-08-27T02:26:04Z","sha256":"7d25fc87eec3768c31754dc28ee686cabf1ef2b53f4144e604011fce6f096211","source_id":"us-cfr","stale":true,"prev":"us/40-cfr-86.402-98","next":"us/40-cfr-86.404-78"},"notice":"GroundRules: Original legal text. Not legal advice."}