| http://www.w3.org/ns/prov#value | - A heat-reflection film comprising:a first layer formed on a base plate which is transparent for visible rays, the optical thickness of said first layer being approximately ??/8 or 3??/8, in which ?? is a designed wavelength; a plurality of intermediate layers from a second layer to a (2n+2)th layer, in which n is a positive integral number, the optical thickness of each intermediate layer being ??
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