英语词汇noise reduction rating怎么读，是什么意思，单词翻译、读音、固定搭配用法和短语词组及例句-英汉双解词典

单词	noise reduction rating
释义	noise reduction rating 翻译降噪等级以上为机器翻译结果，快速获取精准的人工翻译结果，建议选择有道人工翻译网络释义 1 ?减音等级本项防音罩须可清洗，设计之减音等级（Noise Reduction Rating, NRR）至少须可达[25dB（A）][ ]。 2 ?设计之减音等级第02391章一般软质材料塞入耳道内之耳塞不予接受。耳杯内侧与耳朵接触之软垫须为软式泡棉材质。本项防音罩须可清洗，设计之减音等级（Noise Reduction Rating, NRR）至少须可达[25dB（A）][]。 3. 施工 3.1 准备工作承包商应于施工前实地丈量双语例句 1 Noise reduction rating 20 decibels. Made of soft hypoallergenic silicone. 本品由柔软而低应变原的硅树脂制成。 2 Besides well known rating methods, a new one is proposed which may be taken to rate either sound insulation of a partition or noise reduction in the room. 文中综合了现有单值评价方法的优点，提出能使构件隔声与室内噪声取得协调的评价方法。
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