1. Impregnation Foda karfe sassa ne inherently porous.Impregnation, wanda kuma ake kira shiga ciki, ya ƙunshi cika mafi yawan pores da: filastik, guduro, jan karfe, mai, wani abu.Sanya wani abu mai raɗaɗi a ƙarƙashin matsi na iya haifar da ɗigogi, amma idan kun yi ciki, zai ...
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