This lack of static, DC offset current in the output transformer means that the core can be made smaller, because it requires no air gap to prevent core saturation from the static DC offset current.

这种缺乏静态，直流偏移电流输出变压器的核心手段，可更小，因为它不需要空气间隙，以防止核心饱和从静态直流偏移电流。

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There is no air gap between wall and buried copper pipe.

壁体与埋管间没有气隙热阻。

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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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