How was the product proven and what scientific standards were used in the testing baseline?
这个产品是如何被证明有效的，测试基准又依据的是什么科学标准？
Testing receiver's internal noise from zero baseline tests is recognized by many people.
检定接收机内部噪声一般采用零基线法。
Testing receiver's internal noise from zero baseline tests is recognized by many people.
检定接收机内部噪声一般采用零基线法。
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