| http://www.w3.org/ns/prov#value | - Granular materials to be treated for the coating method according to the present invention include various kinds of granular materials having an average particle size usually of about 1 to 10 mm, preferably about 2 to 4 mm and a specific gravity usually of about 0.7 to 1.8, preferably about 0.9 to 1.5.
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