Originally Posted by bikingshearer

Translations, in case you're interested.

"DO" = drop outs, the part of the frame and fork to which the wheel axles attach.
"Bridges" - there is at least one where the rear brake attaches to the frame. There may or may not be another one at the bottom of frame just behind the bottom bracket, i.e. the part of the bike where the axle connecting the two crank arms (to it..........