... in medium materials is polar molecule,under the effect of the rapid change of electromagnetic field,its polarity orientation will alter ... , peach kernel, groundnut kernels, chestnut and so on; and for puffing of leisure food, pachyrhizus chips, potato chips, dried ... , wood , cork, alveolate, cardboard,corrugated cardboard, and so on.4, drying and sterilizing features1, Fast heating.2,Save energy ...