| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To easily and inexpensively supply gas in a heat treatment space; and to save energy. <P>SOLUTION: A heat-treating object is heat-treated by setting the inside of the heat treatment space 3 as atmospheric gas of a desired temperature, and a raw material is raised in the temperature by exchanging heat of the raw material for supplying the atmospheric gas with required temperature exhaust gas exhausted from the heat treatment space, and the gas obtained by this temperature-raised raw material is supplied in the heat treatment space as the atmospheric gas. <P>COPYRIGHT: (C)2004,JPO</p> |
