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Akụkụ olulu mmiri API IADC537 10 5/8 inch (269mm)
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API cones atọ bit IADC537 11 5/8″(295mm) maka isi ike
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Bit tri-cone na-agbagharị IADC537 12 1/4″(311mm)
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Ihe mkpuchi nkume Far Eastern nke e ji ígwè mechie IADC537 13 5/8″(346mm)
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Mkpọpu ihe eji agba ígwè Tricone IADC537 15.5″(393.7mm) maka olulu mmiri miri emi
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Obere ihe ndọpụta TCI IADC537 16″(406.4mm)
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Ntinye tricone bit Tungsten Carbide IADC537 17.5″ (444.5mm)
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Ngwakọta ihe eji agba ígwè API na ISO IADC537 26″(660.4mm)