| http://www.w3.org/ns/prov#value | - vely performing the convection heating in which the variational temperature width is very small and foods can be cooked with no scorching, the infrared radiation heating in which the temperature fluctuation is large and scorching is formed on the cooked foods, and the fermenting heating for raising bread with yeast, the oven comprises a controlling means including a thyristor, etc. and a combinati
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