Okwangoku, iikepusi zewayini ezininzi eziphezulu kunye neziphakathi ziqalisile ukusebenzisa i-metal caps njengokuvalwa, apho umlinganiselo we-aluminium caps uphezulu kakhulu.Okokuqala, ixabiso layo linenzuzo ngakumbi xa kuthelekiswa nezinye iikepusi, inkqubo yokuvelisa i-aluminium cap ilula, amaxabiso e-aluminium eluhlaza aphantsi.S...
Funda ngokugqithisileyo