共有9366人关注过本帖树形打印复制链接主题:垂直入射吸声系数和无规入射吸声系数有什么关系?? | 
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    Post By:2008-11-13 21:24:35 [显示全部帖子]   
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![]() Among any three people walking, I will find something to learn for sure. Their good qualities are to be followed, and their shortcomings are to be avoided.  | 
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