| http://www.w3.org/ns/prov#value | - Preferably this limit is ???15 ??m, advantageously ???10 ??m, for example ???8 ??m, for example ???5 ??m, and usually for example ???0.5 ??m, advantageously ???2 ??m, preferably ???4 ??m, more especially ???5 ??m, for example substantially 10 ??m or substantially 5 ??m. 90% by volume of particles in the ranges 0.5-10 ??m, 2-5 ??m, 5-10 ??m, 4-8 ??m and 2-8 ??m should be mentioned.
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