The present invention relates to the electricity supply elements (4) for being heat-treated meat products to utilize frequency electromagnetic waves and apparatus for carrying out the method. The apparatus according to the invention is favorably applied the present invention also relates to a kind of. It is an object of the present invention to improve to heat or the product that boils in electromagnetic wave penetration depth, in electrode (2,3; 20,22) feed element (4) are placed on outside and outside. The purpose is put into the element (4) in electrode portion (15) by product, this is because the product electrode (15) be used as short-circuit component and be material it is conductive which it is comfortable than product be to needing to be heat-treated.
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