alkaline earth-rare earth ternary sulfide
boundary line of two times between earth excavation area and earth fill area
earth centered earth fixed
earth circuit [= earth return circuit]
Earth Day [first Earth Day in 1970]
earth pressure of earth-strip
earth-centered and earth-fixed(ECEF) coordinate system
earth-centered earth-fixed coordinate system
earth-centered earth-fixed(ECEF) coordinate system
earth-fault and earth-leakage protection
international maritime satellite land earth station {= INMARSAT land earth station
Rare Earth and Non-Rare Earth Impurity
rare earth elements lnon rare earth elements
rare earth oxides of the rare-earth metals
Center for Earth Observation and Digital Earth
Alkaline-earth rare-earth sulfide
2-d pitch-only thrust vectoring