论述了提高双断口真空断路器开断能力的原理，比较了双断口和单断口真空断路器的开断能力。

The mechanism of improving the breaking capacity of vacuum circuit breaker with double breaks is presented in this paper.

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这种接触器采用银氧化镉材料，双断接点，有利于保证较长的电气寿命、较高的抗焊接性能和杰出的断开容量。

The contactors feature silver cadmium oxide, double break contacts to assure a long electrical life, high weld resistance and excellent interrupting capacity.

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我应该这么说。我穿着一件很厚重的大衣。我想这救了我，使我免于断一双手臂。

I should say so. I was wearing a heavy coat. I think that saved me from having broken arm.

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