物或惡之。。。當然有害啦
所有跟帖:
• 如果發射的SPL(聲源級)超過健康標準對人的聽力有害是肯定的。 -gweipwu- ♂ (0 bytes) () 11/21/2018 postreply 09:56:16
• 如果發射的SPL(聲源級)超過健康標準對人的聽力有害是肯定的。 -gweipwu- ♂ (0 bytes) () 11/21/2018 postreply 09:56:16
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