Violin 84-103dB, piano 92-95dB. Sustained exposure of 90-95 may

来源: 小蘑菇于 2017-06-16 07:20:45 [旧帖] [给我悄悄话] 本文已被阅读：次

WENXUECITY.COM does not represent or guarantee the truthfulness, accuracy, or reliability of any of communications posted by other users.

Change Ad Consent