... the door frame, container, hook, grab operation of multi-purpose portal crane .This machine uses AC frequency control, PLC control, ... inland and coastal port handling operations.Parameters of MQ4032-S Portal Cranecrane Hook Operations 20t30t40tMax. Wind Speed at Work20m/sWork ... ModelsQU70MotorA7405kWPowerAC380V 50HzWheel Base/ Track13m/10.5mWeihgt405t Heavy-loading 40T Portal Crane Made in China