allowable shut-off time of fast shut-off valve

fall off [= bear off]

hang off [= stop off]

Off beat takes off

Off-Line Handwritten Chinese Character Recognition (off-line HCCR)

off-line trusted third party (off-STTP)

Off-on-off

one-off write-off

voltage cut off or current cut off

av eff

biological eff

compositive eff iciency

current eff iciency

damping eff-iciency

Eff

eff ects

Eff icacy

eff icacy evaluation

Eff iciency