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1.碟片放入CD机,如能在5s内读出重放,说明此碟片质量较好;如5～10s内能读出重放说明此碟片质量稍差,须严格控制重放次数;如15～20s内才能读出重
1. Disc into the CD player, if read out in 5s replay, indicating that this disc is better quality; such as 5 ~ 10s can read out the playback instructions The disc quality is slightly worse, to be strictly controlled playback If the number of 15 ~ 20s can read heavy