1.Ubuhumekero Guhumeka bigomba kwitabwaho kuri tarpauline, cyane cyane kuri tarpauline ya gisirikare. Ibintu bigira ingaruka kumyuka ihumeka harimo imiterere ya substrate, ubucucike, ibikoresho, ubwoko bwisuku itagira amazi, resin adhesion, nibindi. Hamwe no kwiyongera kwa resin, umwuka permeabili ...
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