You don't have to change disc as long as

来源: wimax88 于 2009-07-02 09:47:22 [] [旧帖] [给我悄悄话] 阅读数 : (100 bytes)

its surface is smooth and its thinkness does not reach the minimun thinkness (normally it does not).

请您先登陆，再发跟帖！