In 1951, the first fully hydraulic backhoe excavator was launched at the Poclain plant in France, creating a new space in the field of excavator technology development. In the early and mid 1950s, dragging was developed. Full-slewing hydraulic excavators and crawler-type hydraulic excavators. The hydraulic excavator that was trial-produced in the initial stage was a hydraulic technology using aircraft and machine tools. It lacked hydraulic components suitable for the excavator's various working conditions. The manufacturing quality was not stable enough and the parts were not complete. Since the 1960s, hydraulic excavators have entered the stage of promotion and vigorous development. Excavator manufacturers and varieties have increased rapidly in various countries, and production has soared. Between 1968 and 1970, the output of hydraulic excavators accounted for 83% of the total excavator output, which was close to 100%.
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