The variation of ac electrical properties as a function of frequency shows that the conduction network of carbon black has been formed in the composites.

复合材料交流电性能参数随频率的变化规律表明活化炭黑在聚丙烯基体中已形成导电网络。

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The two groups were comparable in the air conduction (AC) and air bone gap (ABG) values , and had no difference statistically.

二组的年龄、术前气导（AC）和术前气骨导差（ABG）相似，统计分析差异无显著意义。

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