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product noise standard
释义
product noise standard
Encyclopedia
工学
产品噪声标准
释
product noise standard
产品噪声标准
为减少产品使用中噪声对环境以及使用者的影响,促进产品质量提高,对产品的声音排放特性指标所作出的法规性技术规定。通常用A计权的声功率级或声压级表示,需要按规定的方法进行测量。
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Complete Edition of Poetries in Pre-Qin, Han, Wei, Jin, Northern and Southern Dynasties
complete elliptic integral
complete elliptic integral of the first kind
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