Pneumatically balanced regulator means there is a hole in the seat, called that because it seats against some sharp pointed brass to block the air flow when you're not inhaling. A balance chamber behind it will then have the same pressure air as is coming down the hose. This means they can use a lighter spring and that should in turn make the breathing easier.
Breathing
I think you mean BUSEAR, which means to go scuba diving. El buseo = scuba diving. Buseador = scuba diver.
You mean a scuba suit?
Self Contained Underwater Breathing Aperatus
Self contained underwater breathing apparatus.
It means Self Contained Underwater Breathing Apparatus
The regulator is inside of the alternator.
Self Containing Underwater Breathing Apparatus
Buceo is a conjugation of the original verb "bucear" which means "to scuba dive." By dropping the -ar and adding the -o, the word it being changed to "I scuba dive."
The numbers on a scuba tank reveal 3 things. Serial no. of the tank. Type metal. and the current hydro date.
That is a Scuba diver flag, meaning "diver down."
Assuming you mean the voltage regulator. Chrysler products of that era used the "One wire system". The voltage regulator is integral to the alternator.