| http://www.w3.org/ns/prov#value | - However, the selection will advantageously be made of powders containing fine particles, at least 70%, preferably at least 80%, of the particles of which exhibit a mean diameter of less than 100 ??m, better still less than 80 ??m, for example less than 65 ??m, all the particles exhibiting a size of less than 200 ??m.
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