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问题:

[名词解释] 消声器muffler;sound absorber;deafener

问题:

[名词解释] 阻性消声器resistive muffler

问题:

[名词解释] 抗性消声器reactive muffler

问题:

[名词解释] 阻抗复合消声器impedance muffler

问题:

[名词解释] 微穿孔板消声器micropunch plate muffler

问题:

[名词解释] 消声弯头bend muffler

问题:

[名词解释] 允许噪声级permitted level

问题:

[名词解释] 隔声量sound reduction index

问题:

[名词解释] 空气声air-borne sound

问题:

[名词解释] 撞击声impact sound