Operating cranes brands are: 1 Tadano TADANO, tonnage, type, TL-250E, TL-300E 200-ton crane company, TG-450E, TG500E, TG-550E, TG-700E, TG-800E 200-ton crane, TG-1000E Used Tadano 200 t crane, TG-1200E TG-1600E AR-2000M2 used concrete mixer; brand; Hualing (9-10 square filling) Auman, (8--12 square filling) HOWO (10 12 square filling) Steyr, (8-12 square filling) Crane risk control: lifting weights, lifting someone prohibited within the operating radius of the crane, lifting prevent the occurrence of injuries. Non-stayed crooked drag or weight lifting buried unidentified objects used 200 tons crane, lifting injuries to prevent the occurrence. Lord, vice-two lifting bodies, do not permit the use of main and auxiliary hook work to prevent improper operation, damage caused by hanging objects or personal injury.