83/4" HS642XA API-t és az ISO acél test PDC Fúrószár olajkút fúrásához
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81/2" HM352XA високо качество център късче производител стандарти PDC свредло за пробиване |
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83/4" HM952XG Ķīnas labākais Ock Drill Bits, arī urbumu |
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83/4" HM962XA 5 Blade Matrix corpul preţul ridicat de calitate şi Competitive Rock diamant pentru gaz de foraj |
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83/4"HM952XAG Tough-Drill Bits Professional Diamond Pdc Drill Bit For Hard Rock Drilling |
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