电流密度：单位电镀面积下所承受的电流，通常电流密度越高膜厚越厚，但是过高时镀层会烧焦粗燥。
Current density: unit under the plating area under current, usually the higher current density film thickness is thicker, but is high coating will scorched thick dry.
如果人体组织和电极之间的有效接触面积保持不变，那么高频电流强度扩大一倍将会使电流密度增大一倍，并产生四倍的热量。
Doubling hf-current results in a doubling of current density and a fourfold heat provided that the area of effective contact between the tissue ang the electrode remains constant.
相应地，如果将有效的电极接触面积加大一倍，电流密度将减少一半，热量则减少75%。
This results in a fourfold increase of heat Correspondingly, heat drops by 75% if current density is reduced by half, e. g. by doubling the effective electrode contact area.
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