Work platform - KANG HYUN JAE; LEE SANG KYUNG; AHN YONG JUN; LEE HYUN WOO; CHANG JUN HYUK (2023)
Keywords: BASIC ELECTRIC ELEMENTS; CRANES; ELECTRIC SOLID STATE DEVICES NOT OTHERWISE PROVIDED FOR; ELECTRICITY; HAULING; HOISTING; LIFTING; LOAD-ENGAGING ELEMENTS OR DEVICES FOR CRANES, CAPSTANS,WINCHES, OR TACKLES; PERFORMING OPERATIONS; SEMICONDUCTOR DEVICES; TRANSPORTING