Oriṣiriṣi Oriṣiriṣi ti iwakusa Ati Awọn gige Liluho daradara
Iwakusa ati liluho daradara jẹ awọn iho alaidun iho ti o lu nipasẹ ati wọ inu asọ ati awọn ohun elo apata lile. Wọn ti wa ni lilo ninu iwakusa, liluho daradara, quarrying, tunneling, ikole, Jiolojikal