... 变废为宝 changing waste into valuable 标准环境 standard environment 标准噪声源 reference noise source ...
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This speciality standard will give a go-ahead for using as the reference of the cold and room-temperature microwave noise standard source below 3dB ultra-low-noise received system.
本标准批准后即作为噪声系数3分贝以下低噪声精密测试时的“冷热源”专业技术标准。
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