... structure, definite stress, stable operation, simple operation,steel coil lifting protection Work principle: The coil lifter is driven by a motor ... translated driven by the gearwheel. Point: 1, There is Electro-optical Sensor Protection System (patent number: ZL 2010 2 0128833.3) to ... used. It is moderate price, easy to operate, provide good protection for coil. Steel coil Lifting tongs with ...