| http://www.w3.org/ns/prov#value | - The mandrel may be fabricated from a thin (e.g., about 1-5 mm) thermally conductive metal such as aluminum, steel, brass, copper, and the like, and may be at least partially hollow to accommodate a fluid such as water, glycol or other heat transfer medium in an amount ranging for example from about 0.5 to about 3liters.
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