diplexer
dip-needle
dipole
dipole-quadrupole
dipper
dipping
diprod
dipstick
dip-tube
Dirac
  direct
direct-access
direct-acting
direct-action
direct-air
direct-axis
direct-babbited
direct-contact
direct-conversion
direct-coupled
direct-cranking

    direct proof

    прямое доказательство