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一锟姐定锟斤拷为锟斤拷锟斤拷筒锟斤拷转锟斤拷锟斤拷效锟绞★拷锟斤拷db锟斤拷示锟斤拷锟斤拷锟斤拷卮锟斤拷锟斤拷锟斤拷牟锟斤拷员锟阶硷拷锟斤拷瓒ㄎ� ?0db=1v锟斤拷锟斤拷锟皆达拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷值锟斤拷为锟斤拷值锟斤拷锟斤拷锟界：-58db 锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷一锟斤拷锟斤拷 锟斤拷28--锟斤拷66 db之锟斤拷选锟今，诧拷同锟斤拷锟斤拷途锟斤拷锟斤拷锟脚诧拷同锟斤拷锟斤拷锟斤拷锟斤拷要锟斤拷锟斤拷锟界：锟绞记憋拷锟斤拷锟皆碉拷锟斤拷锟斤拷锟斤拷值要锟斤拷捅冉细撸锟揭拷凇锟�27db锟斤拷锟揭ｏ拷锟届颈锟斤拷筒锟斤拷锟斤拷钱锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷冉系停锟街灰�-62db锟斤拷锟揭就匡拷锟皆★拷锟斤拷锟斤拷锟结及锟斤拷锟角ｏ拷锟斤拷筒锟斤拷锟斤拷锟饺的高低诧拷锟斤拷锟角达拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟饺撅拷锟斤拷锟侥ｏ拷锟斤拷锟斤拷锟铰凤拷械牡锟斤拷锟絩锟叫关★拷锟斤拷锟斤拷锟斤拷锟侥达拷小直锟斤拷影锟届到锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟饺★拷同锟斤拷一锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷貌锟酵拷锟絩值锟斤拷锟斤拷锟斤拷锟饺撅拷锟斤拷全锟斤拷同锟斤拷锟斤拷锟界：r值为1k锟斤拷2k时锟斤拷锟斤拷锟斤拷锟饺匡拷锟斤拷锟斤拷7db锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟侥ｏ拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷一锟斤拷要锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷通锟斤拷为锟斤拷2.2k 锟斤拷3v 锟斤拷
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