数字输出是预先计算并无额外计算要求所必须的。

The digital output is pre-calculated and no extra calculation is required.

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根据测试结果和预先整定好的参数能够自动计算误差、数字显示并打印输出。

According to the testing result and parameters beforehand set the meter can automatically calculate, display and print the error of the tested meter.

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