Plus the long arm excavator into a two-stage, three-stage, four-part, two-stage mainly applied to earth and sand, concrete and other building transportation, highway slope repair and dredging river dredging and building foundation, rivers, deep groove, etc. Earthwork excavation work. Due to the relatively high cost Sec plus the long arm, in order to save costs, there have products on the market sets arm, it is in the original excavator arm plus a small section sets arm sleeve arm period set in the original excavator arm Matoushan The other end mounted bucket (bucket capacity generally smaller than the original fight 1/3) operations. Plus the long arm excavator production of folding is generally used 3D computer-aided design system to do stress analysis and motion simulation, in addition to proficiency in processing equipment, staff skills and practical application of knowledge, experience, and selection of materials, production processes, etc. are extended to the excavator the structural strength of the arms, the use of performance and quality has a crucial impact on the long arm excavator manufacturing equipment off due to the long arm excavator is a large heavy industrial products, they need special equipment to large-scale high-efficiency, high-quality processing of manufacturing, in order to maximize ensure processing quality and manufacturing standards, such as: CNC plasma cutting machine, large groove milling machine, bending machine, large welding positioner, large floor boring machine.