Guangzhou Huitong Machinery Manufacturing Co. for Kobelco excavator design, production standards Kobelco excavator arm and a non-standard size plus the long arm. Through advanced computer-aided design systems, various types of processing equipment, skilled staff skills and practical application of knowledge and experience from the stress points Huitong company designed and manufactured according to customer requirements plus the long arm of modern excavators and modern three-plus the long arm, two-stage Modern extension arm can be extended to the size of the (13-26) m, two-stage lengthening size excavator arm is mainly applied to the foundation and earthwork deep graben and remote clearing silt excavating operation; three-lengthening size excavator arm can be extended to (16-32) m, three-lengthening size excavator arm is mainly applied to the dismantling of high-rise buildings and other projects.