经过长期的试验．实时时钟运行稳定准确，取得了良好的效果。

The real time clock works stablely and accurately by a long time experiments.

youdao

经过长期的试验．实时时钟运行稳定准确，取得了良好的效果。

The real time clock works stablely and accurately by a long time experiments.

youdao