【正文】
Heating, by V. Rudnev, D. Loveless, R. Cook, and M. Black: Marcel Dekker Inc., New York, 2022, 800 p. 4 Coil Efficiency Improve ? Way to improve the coil efficiency: ? (a) reducing the coupling distance between the work piece surface。 ? (b) reducing the current carrying region of the coil。 ? (c) reducing stray losses (by reducing the reluctance of the ai