| 摘要 |
Combustibles such as oily substances adhered to or impregnated in metallic articles are removed, before the articles are subjected to a heat-treatment for carburizing or sintering them, by heating them in a heating chamber with a combustion tube, and discharging the combustibles outside of the chamber after having sucked under a negative air pressure the combustibles into the tube instantly they have been evaporated from the articles and after having burnt the combustibles in the tube.
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