Definitions

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Unsure what all of those abbreviations and acronyms we use are? This should help:

AFB

Angled Filter Box

 

DB

Dymanic brake

 

EDM

Electro-discharge machining

 

EMD

Electromotive Division (of General Motors

 

ERDB

Extended Range Dynamic Brake

 

GMDD

General Motors Diesel Division

 

NDB

No Dynamic Brake

 

NS

Norfolk Southern

 

PAF

Paper Air Filter

 

PRR

Pennsylvania Railroad

 

SFB

Square Filter Box

 

SOU

Southern Railway

 

SP

Southern Pacific