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| call sign (The identifying code letters or numbers of a radio or television transmitting station, assigned by a regulatory body) | |||
| station call sign; voice call sign; call signal; calling signal; offering signal | |||
| calling-on signal | |||
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kaldesignal : 6 短语, 2 学科 |
| 煤炭 | 1 |
| 通讯 | 5 |