Search
Search results for: 电报粉丝服务商（SMMFS.COM）关注购买飞机拉人 DBa in all categories
No results found containing all search terms. 1 result found containing some search terms.
... procedures in SEPP N-1. The assessment uses this. Marshall Day calculated the background level as 48 dBA. So applying the influencing factor of 0.3, a night time noise limit of 44 dBA ...