Umshayeli wenqwaba ebambe eceleni uyithuluzi lobunjiniyela elisetshenziselwa ukushayela izinqwaba emhlabathini, kungaba ngokhuni noma ngensimbi. Isici sayo esihlukile ubukhona bendlela yokubamba eceleni evumela ukushayela usuka kolunye uhlangothi lwenqwaba ngaphandle kokudinga ukuthi umshini uhambe. Le ndlela yenza umshayeli wenqwaba asebenze ngempumelelo ezindaweni ezivalekile futhi ifaneleka kakhulu izimo ezidinga ukuma okunembayo.