Khetha okokusebenza.Izinto zokubeka ithawula ngokuvamile ziyinsimbi engagqwali, ingxubevange ye-aluminium, ingxubevange ye-zinc nethusi nezinye izinhlobo ezi-4.Insimbi engagqwali ishibhile, ukumelana nokugqwala kuhle, kodwa isakhiwo asiqinile, ukuzinza akukuhle ngokwanele;I-aluminium alloy nezindleko ze-zinc alloy ziphakeme, ukuzinza kungcono kunensimbi engagqwali;I-Copper iyisinqumo esingcono kakhulu sokuzinza, ubulukhuni kanye nesicwebezelisi, kodwa singabiza kakhulu kunalokho okuyikho.Ngakho amahinge eshawa eminyango yengilazi