... .5.Many kinds of material can be smashed together.6.Changeable combined compact structure, so one set can serve ... powder, copier toner, and electronic material. Such as lead/acid batteries, NiCd battery, errite, manganous-manganic oxide, lithium cobalt oxides, carbon ... barite, kaolin, ground calcium carbonate, mica and so on.6. Reflectorized material and power coatings.Such as iron oxide, titanium ...