two-alternative
two-aspect
two-axial
two-axis
two-band
two-base
two-beam
two-blade
two-block
two-bottom
  two-cavity
two-chamber
two-channel
two-circuit
two-coil
two-colour
two-compartment
two-component
two-control
two-cycle
two-cylinder

    two-cavity klystron

    двухконтурный клистрон, двухрезонаторный клистрон