| http://www.w3.org/ns/prov#value | - The mean agglomerate particle size (by volume) generally is no more than 80 ??m, for example no more than 75 ??m, preferably no more than 60 ??m, for example no more than 50 ??m, or no more than 40 ??m, and generally at least 15 ??m, for example at least 20 ??m, preferably at least 25 ??m.
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