
Heavy-Duty 3-4 Axle Box-Type Rear-Dump Semi-Trailer for Gravel Tipper Semi Trailer Truck Trailers. Four axle heavy duty structure with strong load bearing capacity. Lightweight frame made of 700 high strength steel, higher payload and lower fuel consumption. Large angle hydraulic lifting for fast and efficient unloading. Four axle synchronous braking for safer heavy load driving. Low center of gravity stable design to effectively prevent rollover. Reinforced suspension system, suitable for complex road conditions. Thickened hydraulic cylinder with strong lifting force and low oil leakage. U shaped wear resistant cargo box, clean unloading without material adhesion. Reasonable wheelbase for flexible turning and good site passability. National standard compliant for license registration, widely used in various transportation scenarios.