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features:
main oil tank is installed on the head of hydraulic machine, the structure is compact ,and has high security propertygantry frame adopt four columns, the intensity is high and work steadythe going organ adopt rack gearing, low noise, positioning accurately and going fasthold up automatically , rotation and automatization in high extentlow vibration, no oil spill, environment protection , safety, fast, decreasing labor intensity and increasing work efficiency.drill pipe straightener