What does DEF stand for?

Diesel Exhaust Fluid

Selective catalytic reduction (SCR) systems utilize DEF to reduce NOx. DEF is made up of 32.5 percent urea and 67.5 percent de-ionized water. The ammonia in the urea mixes with engine exhaust gases in the SCR catalyst to convert NOx to nitrogen and water vapor.

Dark Elf

Define

Iobit Malware Fighter Definitions File

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Dose Effect Factor

Danish EL-Federation