LS c - mani
- LS cost
- LSIC
- LT
- LTMS
- lube oil
- lube oil mist eliminator
- lube oil unit
- lump-sum cost
- LWN nozzle
- MAC
- macaroni tubing
- machine monitoring system
- magnetic optical disc
- mail report
- main automation contractor
- main burner
- main control room
- main distribution frame
- main engineering contractor
- main flame
- maintaining
- maintenance crane
- maintenance monorail hoist in pump and sludge dehydrator house
- maintenance override switch
- make-up drum
- make-up gas
- makeup
- makeup compressor
- makeup compressor discharge cooler
- makeup compressor suction drum
- makeup gas compressor
- makeup gas drier
- makeup gas kockout drum
- makeup pump
- MAN
- MAN fallback
- management information system
- manhole
