METHOD OF SURFACE HARDENING OF STEEL WHEEL OF RAILWAY TRANSPORT
ASSEMBLY OF ALUMINIUM PARTS AND STEEL PARTS WITH COATING FROM ZnAlMg ALLOY
METHOD FOR PRODUCING OPTICAL POLYCRYSTALLINE ZINC SELENIDE
PANEL FOR VEHICLE COMPRISING COATED STEEL SHEET REINFORCED IN PLACES
COMPOSITION FOR RECOVERY OF WORN OUT CONTACT CONDUCTORS IN SITU
FUNCTIONAL ELEMENT WITH ELECTRICALLY CONTROLLED OPTICAL PROPERTIES