gear box technical draw notation (Australian) 1

[tommyghedo]

Dear users,

who can tell me what is this notation on the draw?? ( I mean the T beside the dimension/number on the arrow related to the gears teeth)

I ve attached a pic to clarify.

 

[BrianE22]

Number of teeth on the gear.

 

[moiz19670309]

Yes, it is number of teeth on each gear