| 摘要 |
A heating device comprises an thermally conductive tubular body with a thermally conductive end closure disposed at an axial end of the tubular body, an electrical resistance heating coil disposed in the tubular body and having an end spaced axially from the end closure, and a thermocouple disposed between the end of the heating element and the end closure. An outer tubular casing is disposed about the tubular body with an outer end cap disposed at an axial end of the tubular casing in contact with the end closure to receive heat therefrom by thermal conduction.
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