发布时间:2025-01-20 21:12:44
静音房(降噪:艾弗尔声学)噪音治理措施可以针对下面三个部分中的任何一个或多个部分。控制噪声的源头。从源头上来解决,降低声源噪音。或者改变噪音源的运动方式,比如使用隔音阻尼材料、隔振等措施降低固体发声体的振动。阻断噪声的传播。
节距4445的双排16齿17齿36齿的平片链轮的外径和厚度分别是多少价钱大概多少
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