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Bibikely fandavahana lavadrano API IADC537 10 5/8 santimetatra (269mm)
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API telo kônina bit IADC537 11 5/8″(295mm) ho an'ny lavaka mafy
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Bit tri-cone mihodina IADC537 12 1/4″(311mm)
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Bibikely fandavahana vatolampy Atsinanana Farany voaisy tombo-kase metaly IADC537 13 5/8″(346mm)
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Fandavahana Tricone roller bit IADC537 15.5″(393.7mm) ho an'ny lavadrano lalina
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TCI fandavahana IADC537 16″(406.4mm)
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Bibikely tricone fampidirana karbida tungstène IADC537 17.5″ (444.5mm)
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API & ISO tricone roller bit IADC537 26″(660.4mm)