The output of the machine connect DAC0832 to carry on a DA conversion, again pass operation amplifier to put an end exportation wave-form.

在单片机的输出端口接DAC0832进行DA转换，再通过运放进行波形调整，最后输出波形接在示波器上显示。

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Conclusions Provided well preparation before operation and enhancing monitor during and after operation, old gynecologic patients can pass operation period safely.

结论只要术前准备充分，术中、术后加强监护，老年妇科疾病患者可以安全度过围手术期。

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If more than one column is aggregated using the same grouping key or without a grouping key, then all the aggregations are computed within the same operation with a single pass over the data.

如果利用相同的分组关键字或者没有分组关键字，来聚合多个列，那么，所有的聚合都在单个数据传递中的相同操作中进行。

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