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API 12 1/4 intshi hybrid bit for rock hard deep deep oilwell ukomba
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Umzi-mveliso we-API 17.5 intshi zePDC kunye ne-tricone hybrid drill bit ye-oilwell enzulu
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API 8.5 intshi hybrid sokomba bit PDC-roller ikhompawundi for enzima nzima
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I-9.5 intshi ye-Hybrid bit PDC edityaniswe ne-cone roller yokomba ioli