Uxinzelelo lomoya ophakathi kunye nophantsi amasuntswana e-DTH
Izinto ezilungileyo zeHFDukugrumba ukuntywila
I-drill bit yenziwe nge-alloy material, enobomi obude benkonzo kwaye iphezulu kuneemveliso ezifanayo, kwaye i-drill bit ityumza ilitye ngempembelelo kunye nokucheba. I-HFD drill bits inobuxhakaxhaka bokungagugi kwaye ifanelekile ukugrunjwa kwindawo ethambileyo kunye nzima(9-grade drillability of rock,hard rock drill) , xa kuthelekiswa nesuntswana eliqhelekileyo, ngakumbi ukombiwa kwe-6-8 grade rock umphumo ubaluleke kakhulu.
