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abbattimento del rumore
environ.	噪声控制 为了支持消音技术、设备或防止、减少声音的传播，从源头上减少噪声的措施。措施可包括隔离和减幅振动源；使用消音部件和材料更换组件；围住特定的噪音部分；提供隔音屏障等。