| http://www.w3.org/ns/prov#value | - More particularly, as shown in FIG. 4 a fixing roller 1 is composed of a cylindrical core 2 made of a metal such as an aluminum alloy or ceramics and a heater 5 disposed in the cylindrical core 2, the cylindrical core 2 having a surface layer 4 made of a heat-resistant resin such as polytetra fluoroethylene or a heat-resistant elastomer material such as silicone rubber or a fluoric rubber.
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