A northern European installation would not have the large number of small single phase motors for air conditioning.
2.
It is possible that some very fancy three phase motors are internally six-phase motors ( using the same technology as a single phase motor ).
3.
Unlike a single phase motor, a three phase motor doesn't have a capacitor to rotate the incoming power and create a second phase ( technically, single-phase motors convert the power to 2 phase power internally and are really 2 phase motors ).
4.
Larger single phase motors are split-phase motors and have a second stator winding fed with out-of-phase current; such currents may be created by feeding the winding through a capacitor or having it receive different values of inductance and resistance from the main winding.
5.
But, if the polyphase motor was not selected and it was desired to use a single phase motor on polyphase service, then multiple machines had their motor and heater loads'balanced'so that any 2 or 3 machines would appear to the electric utility as a balanced polyphase load; in any event the Linotype company would supply whatever drive was necessary, even using kerosene heaters and line-shaft operated machines, in locales without electricity.
मोबाइल