In order to maximise the emissivity of the observed target area surface and to limit stray radiation from the axle box, the underside surfaces of the axle box and its immediate environment shall be designed to have a matt finish and be painted with dark paint of a matt finish.
Selleks et maksimeerida vaadeldud sihtala emissioonitegurit ning piirata kiirguse hajumist teljelaagritelt, tuleb teljelaagrite karbi aluspinnad ja ümbrus valmistada mati viimistlusega ning värvida tumeda mattvärviga.