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Zvidimbu zvekuboorera matombo zveAPI IADC537 10 5/8 inches (269mm)
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API makoni matatu bit IADC537 11 5/8″(295mm) yetsime rakaoma
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Chidimbu che tri-cone chinotenderera IADC537 12 1/4″(311mm)
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Chidimbu chekuboorera matombo cheFar Eastern chakavharwa nesimbi IADC537 13 5/8″(346mm)
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Kuboorera zvidimbu zveTricone roller bit IADC537 15.5″(393.7mm) yetsime rakadzika
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TCI drilling bit IADC537 16″(406.4mm)
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Tungsten Carbide Isa tricone bit IADC537 17.5″ (444.5mm)
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API & ISO tricone roller bit IADC537 26″(660.4mm)