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??????GA/Tl46-1996

(1996725? 199711??)

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2.5 ???????
2.6 ???????()??????
3?
3.1 ??5cm2????????
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3.5 ?????
3.6 ?2cm2??4cm?
3.7 ??
3.8...

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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??3.1...

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? 2008-6-8 10:03:29
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(?????? CA/T146-1996-07-25)

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6?2???4??
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10?26dB?????
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19??5?4??2??
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