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1??2???55????????????

2??3??? 300??

3??4??? 800??

4??5??? 2100??

5??6 ???6000??

6??7 ???8000-9000??

7??8 ???10000—12000??

8??9???14000—15000??

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???????????????飬??????????????????????????????????????

?????????????????????????????????http://www.audiogearreviews.com/news/201606/576540.html

?????????????????????http://www.audiogearreviews.com/rexzg/

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