Khetha ezivela kuhlu lwamathuluzi aphezulu, izindlela zokucubungula izinto ezingaveli, kanye nezixazululo zezingqinamba ezindaweni zabathengi.
Ama-crusher adlala indima ebalulekile ezikhumulweni zamandla, ikakhulukazi ezikhumulweni ezisebenzisa amalahle, lapho asetshenziselwa khona ukwephula amaqanda amakhulu amalahle abe ngosayizi abancane, abangakwazi ukuphathwa kalula ukuze kuqinisekiswe ukushiswa kahle.