Wopanga makina opopera a polyurethane / polyurea, zidazo ndizoyenera kutsekemera kwamafuta, osalowa madzi, odana ndi dzimbiri, kuthira, etc. Kupopera mbewu kwa polyurethane kuyenera kuchitika m'malo ambiri.Mwinamwake anthu ambiri awonapo ntchito yomanga kupopera mbewu kwa polyurethane, koma ndi ...
Werengani zambiri