Kubowola kwa petroleum Kubowola kwa petroleum kumagwira ntchito yofunika kwambiri pakubowola mafuta, kumathandizira kwambiri pakubowola bwino, kuchita bwino, komanso mtengo wake. Mitundu ya zida zobowola petroleum imaphatikizapo scraper bits, roller cone bits, diamondi bits, ndi PDC bits (polycrystalline diamond compact bits). Nkhani iyi...
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