engi - exon
- erection cutoff system (for plural gyroscopes)
- erector
- ERG
- ergodicity
- ergology
- ergosome
- ergosphere
- Erhardt process
- ERI
- ERIC
- ERIC EPA's
- Erichsen's cup-test machine
- ericofon
- Ericsson selector
- ERISA
- ERIW
- ERL
- erlang
- Erlang-4
- ERM
- erode binges
- eroded lining
- erodible nozzle plugging ball
- eroding machine
- Erodrill
- EROM
- EROPS
- erosion
- erosion and deposition model
- erosion control blanket
- erosion damage to the kerf wall surfaces
- erosion deformation
- erosion drill
- erosion drill bit
- erosion drilling
- erosion gap
- erosion jet drilling
- erosion machining
- erosion normal cycle
- erosion nozzle
