| http://www.w3.org/ns/prov#value | - The particles have a each a particle diameter and they have a weight (mass) average particle diameter (D50) ranges preferably from 100 to 850 ??m, more preferably from 200 to 600 ??m, still more preferably from 250 to 550 ??m, and particularly preferably from 300 to 500 ??m.
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