MIL-PRF-45334D, PERFORMANCE SPECIFICATION: COMPRESSOR ASSEMBLIES, AIRBRAKE SYSTEM; WHEELED VEHICLE (23 JUL 1997) [S/S BY MIL-DTL-45334E] [SUPERSEDING MIL-C-45334C]., This specification covers eight types of air compressors for airbrake systems of military wheeled vehicles. This specification also covers accessory governors and air cleaners for type I and type II compressors (see 6.1).