| http://www.w3.org/ns/prov#value | - The pressure roller 26 thus constructed, in which a rubber material such as silicone rubber constituting the elastic layer 26 b has a property of expanding and contracting depending on the temperature, tends to show different external profiles at a room temperature (23 ???5???C.) and at a high temperature state (100???C. or higher) when the temperature of the pressure roller is elevated by a conti
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