发布时间:2025-01-17 05:49:26
噪声有很多种类型;
低频噪声,即使噪声值较小,人耳感觉仍然很难听,且能够传很远。
冰箱噪声国标规定的测点在冰箱的前后左右各一个,如果在前面测声压级的话,测点位置为冰箱高度加1米后除以2,测点高度;冰箱长度除以2后加1米;两个数值确定测点位置。
且冰箱产品名牌上面标注出来的噪声值指的是“声功率级”,而不是“声压级”。
建筑面积在4000平米的酒店宾馆需要建设工程消防设计审核申报吗
2025-01-17 05:49:26 2025-01-17 05:49:26 2025-01-17 05:49:26 2025-01-17 05:49:26 2025-01-17 05:49:26 2025-01-17 05:49:26 2025-01-17 05:49:26 2025-01-17 05:49:26 2025-01-17 05:49:26 2025-01-17 05:49:26 2025-01-17 05:49:26 2025-01-17 05:49:26就连高收入的明星在婚恋时也是比较看重房子房子在婚姻中有多重要
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