Knuckle boom truck-mounted crane, the whole machine adopts lightweight design, light weight, small installation space; compact and beautiful structure; double-cavity large-span outrigger structure, better operating stability; slewing reducer drives rotation, 360° continuous rotation , strong adaptability to the working environment; all actions are controlled by a single valve, and the operation is simple and fast; the standard L-HM (CY) XCMG special wide-temperature hydraulic oil can be used in winter and summer.