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8 1/2 Inchi PDC Drill Bit M137 ya Kuboola Miyala Yolimba Kwambiri
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Masamba 7 a PDC obowola zinthu M137 mainchesi 8.5 a chitsime cha mafuta
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Fakitale ya API ya PDC bit yobowola zitsime ilipo
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API fakitale ya PDC Bi Center Bit ya kuboola pansi pa Reamer
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Zipangizo zobowolera miyala za API PDC zogulitsa zinthu zolimba