Excavator manufacturing industrial countries earlier, now used excavators, France, Germany, the United States, Russia, Japan, is 3.5-40 m3 capacity bucket hydraulic excavator of the major producing countries, from the 1980s began producing special large excavators. For example, the United States produced by Marion peeling excavator bucket capacity of 50-150 m3, bucket capacity of 132 m3 walk-draglines; BE (布比赛路斯 Erie) produced 168.2 m3 of bucket capacity Walk-draglines, bucket capacity of 107 m3 stripping excavators, etc., used excavators Yuchai market, is the world's largest excavator. Initially excavator is manual, from discovery to 2013 has been one hundred and thirty years, experienced a period bucket rotary excavator driven by steam to electric drives and internal combustion engine driven rotary excavator, hydraulic integration of the whole application progressive development of automatic hydraulic excavator. The first hydraulic excavator factory invented by the French Poclain success. Because the application of hydraulic technology, in the 1940s on a tractor equipped with a hydraulic backhoe excavators suspended. In 1951, domestic second-hand excavator price, the first fully hydraulic backhoe made in France Poclain (Poquelin) factory launched, resulting in the field of technological development excavators creating a new space, and early 1950s We have developed a mid-drag full-swing hydraulic excavators and crawler hydraulic excavator whole. Early trial is the use of aircraft hydraulic excavator and machine tool hydraulic technology, components for hydraulic excavators lack of a variety of conditions, the manufacturing quality is not stable enough, parts are not complete. Since the 1960s, the hydraulic excavator into the promotion and vigorous stage of development, countries excavator factory and varieties increased rapidly, Heilongjiang used excavator, production soared. 1968--1970 years, excavator hydraulic excavator production accounted for 83% of total production, has been close to 100%. Imported second hand excavator used excavator Jin Hao _ _ Changchun used excavators provided by Shanghai Used Construction Machinery Co., Ltd. Jin Hao. Shanghai Jin Hao Used Construction Machinery Co. (www.jinhaosh.cn) is the Shanghai Minhang District, mining machinery leaders, over the years, the company is implementing the scientific management, innovation and development, the principle of honesty and trustworthiness, and satisfy customer needs. Kim Ho used excavators in leadership with the staff warmly welcome all inquiries negotiations to create jinhao used excavators better future.