1. DYNAMIC MODELING OF DEFECTIVE GEARS. Authors: ALIN-VIRGIL BLOJU, ZOLTAN-IOSIF KORKA.2. ANALYSIS OF METHODS OF HARDENING AND RESTORATION OF WORN PARTS. Authors: ZOLTAN-IOSIF KORKA, MAGELLAN DARIYA, KASENOV ASYLBEK, ISKAKOVA DINARA.3. ORGANIZATION OF TRUCK MAINTENANCE. Authors: ZOLTAN-IOSIF KORKA, NURBOLAT SEMBAYEV, BULBUL UMAROVA.