How to interpret the generator type

Here are the meanings of several common symbols:

T (located in the first step) - synchronization;

Q (in the first or second word) - Turbine

Q (located third words) - hydrogen cold]

F- '> motor generator

N- hydrogen internal cooling

S or SS- water-cooling

For example: TQN said hydrogen cooled synchronous motor generator '>

QFS said the dual internal water cooled turbo generator motor '>

QFQS said water cooled stator winding and rotor winding of hydrogen cooled turbo generator hydrogen cooling motor, '> core