Electric Hydraulic Telescopic Boom Ship Crane Technical Parametersmodel wq4-7 Electric Hydraulic Slewing Ship Craneload Capacity 40kn 4 Tons working Scope 2 7mhoisting Speed 08m/minslewing Speed 00.8r/mintrolley Time 60shoisting Height 20mmotor Model and Power y-18dl-4-h 30kwoperation Method hydraulicslewing Angle 360electric Power ac380v 50hz or Subject to Clients Requesttransverse Inclination less Than 5 Degreefore and Aft Inclination less Than 2 Degree