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High Pressure Boom Hydraulic Cylinder for Concrete Pump Truck. High-Strength Cylinder Barrel. Every cylinder undergoes 1.5rated pressure holding test, weld NDT (ultrasonic/magnetic particle) and full stroke running test before delivery. Customizable mounting type (earring, flange, trunnion, foot), stroke, rod diameter, port size, coating color; reverse-engineering available by sample or drawing.