Rotary drilling rig is a hydraulically powered machine that uses a power head to rotate the drill pipe and bit for cutting through soil and rock, and employs a drilling bucket for cyclic soil extraction to form pile foundation boreholes. It integrates mechanical, hydraulic and electrical control systems, and is widely used in building, bridge, railway and highway projects, capable of adapting to various ground conditions including clay, sand, gravel, and moderately to slightly weathered rock.
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