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API 8.5 inches hybrid drilling bit PDC-roller compound bakeng sa hard hard e rarahaneng
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Fektheri ea API ea lisenthimithara tse 17.5 PDC le tricone hybrid drill bit bakeng sa oli e tebileng
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PDC ea lisenthimithara tse 9.5 e kopantsoeng le rolara ea khoune bakeng sa ho cheka oli
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API 12 1/4 inches hybrid bit bakeng sa ho cheka oli e tebileng ka majoe a thata