日前国内外用于理疗的调制中频理疗机皆属“单动态”调制中频电流 (治疗时只有调制频率的变化 ,载波频率不变 ) ,我们研制的“双动态”调制中频电疗仪 ,在治疗时不仅调制频率变化 ,而且载波频率也同时产生周期性变化。这种“双动态”电流作用于组织的情形有别于“单动态”电流 A few days ago, both domestic and abroad used for physical therapy modulation MF machine are “single dynamic” modulation IF current (treatment only changes in the modulation frequency, carrier frequency unchanged), we developed the “double dynamic” modulation IF electrotherapy instrument, not only in the treatment Modulation frequency changes, and the carrier frequency also produce periodic changes. This “double dynamic” current acts differently on tissue than “single dynamic” current