| 摘要 |
PROBLEM TO BE SOLVED: To enable to magnetize a material by means of one high frequency power supply without exchanging an induction coil or without reducing the efficiency when a light density material is melted using a floating-up melting device having plural induction coils. SOLUTION: A mechanism in which induction coils 2, 3 of upper and lower two sets are serially connected, and the mechanism in which the serially- connected induction coils are connected to one high frequency power supply 5, or 6 are installed.
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