prov:value
| - For example, coloring pigments may be added, and other additives and fillers such as inorganic fillers, e.g., carbon black, graphite, silica, asbestos, glass powder, glass fibers, silicates, and carbonates, metal powders, metal oxides, and metal sulfides may be incorporated for improving wear resistance, preventing low-temperature melt flow, and facilitating the formation of pores and for other pu
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