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| 多路移频键控; 多频移键控 | |||
| 多进制频移键控 | |||
| 多频频移键控 | |||
| 多进制移频键控; 多频调制 | |||
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| 多频移频键控 | |||
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multiple frequency shift keying : 3 phrases in 1 subject |
| Electronics | 3 |
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