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91/2" HS952XA гарної якості API специфікації найнижча ціна нафти сталевого штампованого PDC протяжки для штанг

сталевий корпус дриль, гарна якість, низькі ціни, petroelum свердло хард-рок свердло кам'яні бурових біти, свердло pdc, diamond свердло


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