11
13.
14
15.
16.
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100
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40
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(
-
697770852941Hz
1209133614771633Hz
1.5%
3km
9dBm3dB
7dBm3dB
3.
21dB
20dB
YD/T1277.12003GB/T
152792002
1.
2.
4.
5.
-
4
9
a.12
b.FSKDTMF
100
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(9)
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