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piston solder tail closed space generated jet noise, impact structural noise generated after the piston impact solder and is deformed due to an down the hole drill rig impact surface is generated around the pressure pulse noise, wherein the structure-borne noise is the main ingredient noise frequency characteristics of the structural
down the hole drill rig
zhengzhou Dayu Drill Rig Machinery Co., Ltd.
drilling rig, drilling rig equipment, borehole drilling rigs, mobile dri
