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?? 2011-05-29 16:30 ?? ?? ???? ?
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??? 2011-05-29 16:36 ??????
3.1 ??5cm2????????3.2 ??3.3 ?????3.4 ????3.5 ?????3.6 ?2cm2??4cm?3.7 ??3.8 ????3.9 ???3.10 ?26dB????? 3.11 lcm??3.12 ?????3.13 ????3.14 ?? 3.15 ??3.16 ??2???1??3.17 ????3.18 ??lcm?3.19 ??5cm?4cm2?2cm2?
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??? 2011-05-29 16:42
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