Ama-rock drill, aziwa nangokuthi ama-jackhammer, angamathuluzi anamandla asetshenziswa embonini yokwakha, yezimayini, neyokubhidliza.Le mishini yakhelwe ukubhoboza izindawo zamatshe aqinile ngempumelelo nangokushesha.Ngezansi, sizoxoxa ngezici, ukusetshenziswa kanye nezinzuzo zokubhoboza amatshe....
Funda kabanzi