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Ọnụ ego dị ala API 6 Inchi PDC step drag bit 3 nku dị na ngwaahịa
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Ụlọ ọrụ API nke 4 5/8 Inch PDC drọm drọm nwere agụba atọ
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152mm nzọụkwụ drag bit 3 agụba maka nchọpụta ala
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Ọnụ ego dị ala 360mm nzọụkwụ drag bit 3 maka nhazi siri ike
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Nku anọ maka igwu olulu mmiri siri ike nke dị sentimita isii (6 inch PDC Drag Bit).
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API 152mm PDC concave rock bit 4 Agụba maka igwu olulu mmiri
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8.5 sentimita asatọ na ọkara nke otu ihe mkpuchi cone IADC537G maka igwu nkume HDD
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Onye na-ebunye oghere oghere API No-Dig HDD maka nkume siri ike
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TCI cone trenchless rock reamer maka ịtọ ntọala
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Bit tricone nke dị sentimita 8.5 n'obosara nke API maka igwe mgbagharị agbagharị.
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Ụlọ ọrụ China nke nwere ihe mkpuchi API 4 3/4″ maka gbọmgbọm isi dị na ngwaahịa
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Nkeji 14 3/4 nke tricone bit maka ntọala ikpo ọkụ