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7000m digital-control VF electric rig [ Conventional Drilling - 7000 Meters ] 7000m digital-control VF electric rig [ Conventional Drilling - 7000 Meters ]  Intergral Screw Shafts  Intergral Screw Shafts ZJ40/2250D Skid Mounted Drilling Rig ZJ40/2250D Skid Mounted Drilling Rig casting wheel casting wheel YDG—200 Type Upsetting Machine YDG—200 Type Upsetting Machine
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