Abbreviations.

This part uses the following abbreviations: Table 1 to § 1031.200—Abbreviations ° degree % percent CO carbon monoxide CO 2 carbon dioxide EI emission index g gram HC hydrocarbon(s) kg kilogram kN kilonewton kW kilowatt LTO landing and takeoff m meter mg milligram µg Microgram NO X oxides of nitrogen Num number nvPM non-volatile particulate matter nvPM mass non-volatile particulate matter mass nvPM num non-volatile particulate matter number nvPM MC non-volatile particulate matter mass concentration rO rated output rPR rated pressure ratio SN smoke number