base-base correlation

Dexamethasone Base，Betamethasone Base

sub-base and base

all-engine-enroute-climb speed

crude enroute

enroute

enroute air traffic control service

enroute alternate

enroute chart

enroute climb

enroute descent

enroute height

enroute speed

enroute support team

enroute time

enroute traffic control service

estimated time enroute {= ETE}

estimated time of enroute

(2-hydroxy-3-dodecyl dimethyl quaternary ammonium base) propyl glucosamine