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Pìosan drileadh tobair creige API IADC537 10 5/8 òirleach (269mm)
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Bit trì còn API IADC537 11 5/8″ (295mm) airson tobar cruaidh
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Bit trì-chòn rothlach IADC537 12 1/4″ (311mm)
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Pìos drileadh creige an Ear Chèin le seulachadh meatailt IADC537 13 5/8″ (346mm)
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Drileadh bit rolair tricone IADC537 15.5″(393.7mm) airson tobar domhainn
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Pìos drile TCI IADC537 16″ (406.4mm)
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Bit tricone cuir a-steach carbaid tungsten IADC537 17.5″ (444.5mm)
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Bit rolair tricone API & ISO IADC537 26″ (660.4mm)