surface hardening /INDUSTRY-METAL/
[DE] Einhaertung; Oberflaechenhaertung
[EN] surface hardening
[FR] trempe superficielle
surface hardening /INDUSTRY,INDUSTRY-CHEM/
[DE] Oberflächenverhärtung
[EN] surface hardening
[FR] impénétrabilité superficielle
case hardening,surface converting,surface hardening /INDUSTRY-METAL/
[DE] Randhaerten
[EN] case hardening; surface converting; surface hardening
[FR] trempe de surface