● Gwiritsani ntchito chogwirira chilichonse chamtundu uliwonse pa kulemera kwa gudumu - lead, zinc, ndi chitsulo.
● Kukwaniritsa kapena kupitirira miyezo yapamwamba kwambiri
● Mutu wake wa nyundo umapangidwa ndi pulasitiki yapadera kuti ukhale wotetezeka komanso wosawononga zinthu zotsutsana ndi mawilo opangidwa mwapadera a mawilo a alloy.
● Zinthu zapamwamba zingakupatseni khalidwe lodalirika kwambiri