Hydraul Drive Drill Drill China Vendedor Mini escavadora mecânica
syi rotary drilling rig in the drilling process on the ground disturbance is small, wall mud skin thin, the formation of the hole wall is rough type, is conducive to increase the pile side friction resistance, to ensure the design bearing capacity of the pile foundation.. strong mobility: suitable for construction of various soil layers, such as sandy soil, clayey soil, powdery soil, etc.rotary drilling rigs use dry or non-circulating mud drilling technology, which greatly reduces the amount of mud discharged and disposed of.