| http://www.w3.org/ns/prov#value | - It is pointed out in this connection that a roller body is heated at a rate of e.g. 1??? C. per minute, i.e. ca. 4 hours are needed to raise the temperature of the roller body to 200??? C. Higher heating rates lead to an excessively rapid build-up of pressure in the surface of the roller, which increases the internal compressive stress of the roller body, thus causing internal tensile stresses whi
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