But if they do survive, and find themselves without one or both of their palps - their equivalent of a penis - they will protect their would-be eater, and have benefit without the burden of their privates.
Couple tractor and first semitrailer as described earlier: A converter gear or dolly is a coupling device of one or two axles and a fifth wheel by which a semitrailer can be coupled to the rear of a tractor-trailer combination forming a double bottom rig.
Converter Gear. Converter gears or converter dollies are trailer coupling devices. ABF units typically have one axle with a fifth wheel. Once the converter gear is attached to the rear of a tractor-trailer combination a second trailer can be coupled with the converter gear to form what is known as a double trailer rig.