Chibooreso chedombo chemhepo-gumbo chinotsamira pamhepo yakamanikidzwa kutyaira piston kuti idzoke.Munguva yekurohwa, piston inorova shank muswe, uye panguva yekudzoka sitiroko, piston inotyaira mudziyo wekubooresa kuti utenderere kuti uwane dombo rekupwanya nekuboora.Kushandiswa kwema hydraulic drilling rigs kutsiva air-leg rock drills inzira isingadzivisiki mukuvandudzwa kwecoal mine rock tunneling.Zvisinei, pari zvino, inopfuura 90% yematombo ematombo anonyanya kufambiswa nemhepo-makumbo ekuchera dombo.Iyo air-leg rock drill inobatwa nemaoko, semi-mechanized (inogadzirwa nemaoko, manual inofamba michina) chigadzirwa chine huwandu hukuru uye huwandu hwakawanda.Kushanda kwayo nekugadzirisa zviri nyore, uye mutengo wakaderera.
Nguva yekutumira: Kubvumbi-12-2021
