twin-rudder
twin-screw
twin-shaft
twin-shell
twin-spool
twin-tail
twin-turbine
twin-turbofan
twin-turboprop
twin-wire
  twist
twister
two
two-address
two-alternative
two-aspect
two-axial
two-axis
two-band
two-base
two-beam

    twist boundary

    граница кручения