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Obere nkume cone atọ IADC517 10 5/8″ (269mm)
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Rotary tricone Bits IADC517 9 7/8″ (250mm) maka nkume siri ike
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Tricone Roller Bits IADC517 9.5 inch (241mm)
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Mmiri miri emi Tricone Bit IADC517 sentimita 7/8 (200mm)
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Mkpọchi bọtịnụ nkume TCI nke e ji aka mechie IADC517 6 1/2″ (165mm) maka igwu olulu mmiri
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Mbido ihe eji agba ígwè Tricone IADC517 6 1/4″ (159mm)
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Bits nke bọtịnụ rotary API nke IADC517 5 1/4″ (133mm) dị na ngwaahịa