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Reverse Circulation DTH Hammer Drilling Technique
Iyo inotenderedza kutenderera DTH sando yekuchera dhizaini chikamu chakakosha cheMulti-Tech kudhirowa kwemhepo tekinoroji, uye zvakanyanya kukosha, ndiko kupaza kukuru kwehunyanzvi hwekuchera mhepo.Iyo inosanganiswa neDTH inokanganisa kuputsa dombo, kupuruzira yepakati reverse kutenderera uye ...Verenga zvimwe