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Bọtịnụ API bit IDC537 6.5 inch (165mm) nwere ọnụ ahịa mbelata
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TCI nkume bit IDC537 7 1/2 ”(190 mm)
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API factory tricone bit IDC537 7 5/8 ”(193.7 mm)
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TCI tricone bit IDC537 7 7/8 sentimita (200 mm)
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Ntinye Tungsten Carbide Bit IDC537 8 1/2 ″ (215.9mm)
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API bọtịnụ nkume mkpọpu bit IDC537 8 3/4"(222.2mm) nwere ọnụ ahịa mbelata
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TCI mkpọpu bit IDC537 9 1/2 "(241mm) maka hard rock oilwell
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API olulu mmiri olulu mmiri IDC537 10 5/8 inch (269mm)
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API cones atọ bit IDC537 11 5/8"(295mm) maka olulu mmiri siri ike
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IDC537 12 1/4 ″ (311mm) na-atụgharị
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Igwe mkpọpu igwe dị n'Ebe Ọwụwa Anyanwụ Ụwa IADC537 13 5/8 ″(346mm)
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API tricone drill bit IDC537 14 3/4" (374mm) maka nkume siri ike