Zinc-galvanized springs inoiswa pasi pekupisa-dip galvanization process.Kuita uku kunosanganisira kunyudza chitubu chesimbi mumudziyo wezingi yakanyunguduka pakupisa kwakanyanya.Vanhu vazhinji vanosarudza zinc-galvanized torsion zvitubu nekuda kwekudzivirira kwavo kusingaite ngura nekuora uye vanopa hupenyu hurefu kupfuura zvitubu zvakawanda zvine mafuta.