fastness
fast-neutron
fast-operating
fast-pin
fast-release
fast-response
fast-safety
fast-screen
fast-setting
fast-tension
  fast-warmup
fast-working
fat
fatal
fatality
fat-and-oil
father
fathogram
fathom
fathometer
fatigue

    fast-warmup cathode

    катод с малым временем разогрева, безынерционный катод