词汇	降低噪声级
释义	降低噪声级医Noise Reduction Rating
随便看	Prevention counter-Measures prevention cure Prevention decay wood prevention design prevention devices prevention devotion prevention diseases prevention education Prevention effect Prevention efficiency Prevention engineering prevention en-gineering prevention eountermeasures Prevention/Extermination of plague of locusts prevention first prevention forest prevention for lightning strike prevention for repetitive clear of a signal prevention for rock fall prevention from descaling Prevention from disease prevention from excessive flow leakage prevention from frostbite prevention from losing suddenly prevention from the mistakes