121/4" HM952XA PDC bit untuk batubara tambang pengeboran PDC Drill bit untuk air sumur pengeboran
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produsen pdc bor bit berlian pdc bor bit batubara tambang pengeboran alat/minyak pengeboran bit
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Ychydig pwyllgor penderfyniadau cynllunio, Pwyllgor penderfyniadau cynllunio dril, corff matrics, ffurfiant tywodfaen, olew a nwy drilio, diemwnt d... |
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