The first wave is the stage that emergence and beginning period of industrial laboratory made.

第一波是工业实验室的出现并开始登上历史舞台的时期。

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To provide a stable pure sine wave for laboratory testing for all.

提供稳定纯正弦波，以便实验室作各种测试。

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To provide a stable pure sine wave for laboratory testing for all.

提供稳定纯正弦波，以便实验室作各种测试。

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