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Posted by Jeff H. on Thu May 10 21:58:14 2001, in response to PBCO SBCO BCO, posted by Bill Newkirk on Thu May 10 18:30:09 2001.
The PBCO cuts out the spring-applied, air-released parking brake. The SBCO cuts out the service air brakes. The BCO cuts out both.
The PBCO cuts out the spring-applied, air-released parking brake.
The SBCO cuts out the service air brakes.
The BCO cuts out both.