Crawler yakazara hydraulic tunnel drilling rig yemugodhi wemarasha chizvarwa chitsva cheanokambaira achifamba achitsvaga mvura, kuongorora gasi, kuona kukanganisa, denga, midziyo yekuchera senge jekiseni remvura inonyanya kushandiswa kuita kuchera kwakadzama mudombo rakapfava kana musono wemarasha apo matanho ekurwisa kuputika anodiwa pakuchera kumeso. Yakakodzerawo kune dzimwe nguva.
Iyo midziyo ine compact chimiro, inochinjika kushanda, kufamba kwakanaka, yakazara-chikamu mashandiro, yakanaka kuchengetedza kuita, muchina mumwe kune akawanda zvinangwa uye humwe hunhu. Pamusoro pekupedzisa kuongorora kwemvura uye kuongorora gasi, inogona zvakare kudhiza kuita maitiro akaomarara. Iyo yakashongedzerwa neyakajairika reaming drill bits uye zvichingodaro. Chibooreso chekushandisa chinogona kushandiswa pakuchera rotary.