"Eaos" class rail cargo wagon of the Български държавни железници (Bulgarian State Railways, Cargo) in Kiskunfélegyháza, Hungary. Key for Eaos letter group: *E = Open top railcar with high sidewalls *a = with four axes *o = tipping to the front is forbiden *s = In circulation according to the European "Technical Specification for Interoperability", appendix "B", standard "s" (max speed 100 km/h)