具备232通讯、自动选择量程、数据锁定、数字显示、易操作等功能。

With 232 communication, selection range automatically, data lock, data display, operating easy and so on.

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选择伏特计的最低量程。

Select the lowest range of the voltmeter.

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通常，它只能检测到你机器上的少量程序并让你选择使用。

Usually, it detects and lets you choose only a few of the applications you may have on your machine.

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