78201897
Jan 10, 2003
Nov 30, 2004
HEAT TREATMENT OF STEEL AND METALS; COATING OF METALS AND METAL ALLOYS AND CERAMICS IN VACUUM INSTALLATIONS AND PLASMA VACUUM INSTALLATIONS; SURFACE TREATMENT OF METALS, METAL ALLOYS AND CERAMICS; HARDENING OF METALS AND ALLOYS IN A VACUUM; SURFACE TREATMENT OF METALS, METAL ALLOYS AND CERAMICS THROUGH DIFFUSION, IN PARTICULAR NITRATING
Treatment of Materials