abun ciki
Rufin ƙulle-ƙulle wani nau'i ne na kayan aikin hakowa na asali don gyarawa da goyan bayan anka na ma'adanin kwal. Jikin dutsen dutsen na PDC an yi shi da ƙarfe 45 # mai inganci, kuma ana saka shi a cikin yankan gefuna tare da zanen lu'u-lu'u, wanda ake waldawa daban-daban. Rubutun haɗe-haɗe na lu'u-lu'u wani abu ne na musamman mai ƙarfi wanda ya ƙunshi foda lu'u-lu'u da siminti mai siminti a ƙarƙashin matsanancin zafin jiki da matsa lamba. An yi amfani da matsayin yankan hakori na dutse aron rami bit, wanda ba kawai yana da babban ƙarfi da kuma high lalacewa juriya na lu'u-lu'u, amma kuma yana da taurin Babban tasiri juriya na gami ya sa ya zama manufa rawar soja bit don hakowa cikin matsakaici- manyan dutsen yadudduka a goyan bayan ragamar anka. Za mu iya samar da daidaitaccen girman PDC anga bit da kuma na musamman rufin aron ƙarfe, idan kuna sha'awar kowane samfuranmu, da fatan za a iya tuntuɓar mu ta Lucy@tydrillbits.com.
