| 摘要 |
<p>An heating device comprises an elongated heating element made of of graphite surrounded by a sheath (3) of corrosion-resistant refractory metallic alloy sheet or covered with a protective metallic layer with regular corrugations. The heating element (1) has fixing and centering means comprising an insulating crown (30) engaged in a cylindrical skirt (33) fixed inside the sheath to one end of said element and a composite sole for fixing and supplying electricity to the heating element consisting of two electrically insulated metallic elements rigidly attached to each other by means of a ceramic insulating plate (25).</p> |
