http://www.w3.org/ns/prov#value | - Examples of the multi-layered structure are a double-layered structure with a chromium- or molybdenum-(alloy) based under-layer and an aluminum-(alloy) based overlayer, and a triple-layered structure with a molybdenum-(alloy) based underlayer, an aluminum-(alloy) based middle layer and a molybdenum-(alloy) based overlayer.
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