The telescopic arm of excavator can be divided into two, three and four sections. The two sections are mainly suitable for construction transportation such as sand, concrete, road slope repair and dredging, building foundation, River and deep trench excavation, etc. Because the cost of two extension arms is relatively high, in order to save the cost, there is a set of products on the market, adding a sleeve on the original forearm excavator, SLEEVE arm group of original forearm excavator Maitou hill, the other end of the installation of operation excavator bucket.

　　挖掘机和扩展的手臂通常是由三维计算机辅助设计系统应力分析和仿真运动,其他加工设备,员工技能水平和知识的实际应用,经验,和材料选择、制造工艺的挖掘机的结构强度,延长臂的使用性能和质量有关键影响。

　　Excavators and extended arms are usually made up of three-dimensional computer-aided design system stress analysis and simulation movement, other processing equipment, practical application of employee skills and knowledge, experience, and structural strength of excavators with material selection and manufacturing process, as well as service performance and quality of extended arms.

　　一般过程和过程:电脑设计,数控切割(mn) -折弯机折弯形状(马)——技术人员焊接、大型镗床无聊,延长臂base -挖掘机铲斗油缸和管道安装、压力测试,产品抛丸- - - - - - - - - - -热喷涂,详细的交货前检验,合格的工厂。

　　General process and process: computer design, numerical control cutting (mn) - bending machine shape (horse) - professional technicians welding, boring large boring machine, extension arm base - excavator bucket cylinder and pipeline installation, pressure testing, product shot blasting treatment - - - - - - Thermal spraying, detailed pre-delivery inspection, qualified factory.

　　目前全国地铁建设、环境保护、防污河道疏浚工程方兴未艾，从而拓展了挖掘机的市场需求非常大。加长臂长臂挖掘机在这个充满活力的市场中提供了独特的机会。

　　At present, the national subway construction, environmental protection, anti-pollution river dredging projects are in the ascendant, thus expanding the market demand for excavators is very large. Extended arm excavators offer unique opportunities in this dynamic market.

　　挖掘机的延伸臂分为两个阶段,三个,四个阶段,二段式主要适用于砂质土壤和混凝土施工,如交通、道路坡度修正和河道疏浚疏浚和建设,这条河的基础上,深沟条件如采矿作业,等等,一个三级、四段式主要适用于高层建筑拆除工作,等等。重要的是:根据需要扩大手臂的重量，适当增加锤的重量平衡和锤的重量平衡，前后平衡。避免挖掘机工作中发生意外。

　　The extension arm of excavator is divided into two stages, three stages and four stages. The two-stage type is mainly suitable for the construction of sandy soil and concrete, such as traffic, road slope correction and river dredging and construction. On the basis of this river, deep ditch conditions such as mining operations, etc. A three-stage and four-stage type is mainly suitable for the demolition of high-rise buildings, and so on. The most important thing is to enlarge the weight of the arm according to the need, increase the weight balance of the hammer and the weight balance of the hammer appropriately, and balance the front and back. Avoid accidents in excavator work.