| http://www.w3.org/ns/prov#value | - The thickness of the outer layer(s) is generally greater than 0.1 ??m, is usually in the range from 0.2 to 6.0 ??m, and is preferably in the range from 0.3 to 5.5 ??m, in particular from 0.3 to 5.0 ??m, and it is possible for the outer layers to have identical or different thicknesses.
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