Abancishisi bevel be-Helical yizinto ezibalulekile emkhakheni wemishini yokudlulisa kagesi. Zidlala indima ebalulekile ekusatshalalisweni okuphumelelayo kwamandla kusuka kwelinye iphuzu kuya kwelinye. Lezi zinciphisi zenzelwe ukudlulisa amandla phakathi kwemiphini ebhekene komunye nomunye, ukuhlinzeka ngezinga eliphakeme lokusebenza kahle nokuthembeka ezinhlelweni zokudlulisa amandla. Inzuzo eyodwa ebalulekile