| 摘要 |
A furnace for the heat-treatment of metallic articles with a protective atmosphere such as a reductive gas mainly consisting of H2, CO, N2. Said protective atmospheric gas is made from LPG, LNG, urban gas and other raw natural gases which have been supplied into the furnace directly from their sources by heating them by heating elements within the furnace and simultaneously converting them by a plurality of catalytic means extending along said heating elements.
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