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83/4» HM952XA 222.2 дюймовый стальной корпус нефтяных скважин Pdc сверло долото Pdc

нефтяной скважины долота pdc, стандарту API, бурение скважин, профессиональный сверло, алмазные сверла, сделанные в Китае сверло


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