6.3ton Hydraulic Knuckle Boom Truck Mounted Crane

6.3ton Hydraulic Knuckle Boom Truck Mounted Crane. Marine-Grade Corrosion Resistance: Epoxy zinc-rich primer and polyurethane acrylic finish protect against seawater corrosion. Sealed Anti-Corrosion Design: Fully sealed structure protects internal key parts from damp and corrosive environments. High Torque Double Rack Cylinder: Double rack oil cylinder ensures large rotary torque, low failure rate, and long service life. Reliable Telescopic System: External and internal oil cylinders provide reliable performance and easy maintenance. 1-Year Comprehensive Warranty: 12 months warranty on components, engine, hull, and fabricated parts with free replacement. Professional OEM/ODM Service: Supports full customization from samples or designs with flexible customization options. Certified Quality Standards: Products certified with GS, CE, and ISO9001 standards for international compliance.