Juya wurare dabam dabam hakowa kayan aikin
Reverse Circulation (RC) hakowa wata dabara ce da ake amfani da ita wajen binciken ma'adinai da hakar ma'adinai don tattara samfuran dutse daga ƙasan ƙasa. A cikin aikin hakowa na RC, ana amfani da hamma na musamman da aka sani da “Reverse Circulation hammer”. Wannan dabarar tana da tasiri musamman don samun samfurori masu inganci daga zurfafan dutse mai zurfi da wuya. Kayan aikin hakowa mai juyi dawafi shine guduma mai huhu da aka ƙera don ƙirƙirar ƙarfi ƙasa ta hanyar tuƙi ɗan rawar sojan cikin samuwar dutsen. Ba kamar hakowa na gargajiya ba, inda aka kawo yankan zuwa saman ta hanyar igiyar rawar soja, a cikin hakowa na RC, ƙirar guduma tana ba da damar jujjuyawar yankan.
