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- 次DM信号DM secondary signals
- 复合DM信号DM complex signals
- Dm信道上的链路接入规程Link Access Procedure on the Dm channel LT
- 帐号account number
- 单号odd numbers
- 六号6th day of the month
- 求职信application letter
- 三号thirds
- 二号2nd day of the month
- 不可信unlikelihood
- 区号district number
- 封信seal up an envelop
- 分号semicolon
- 发短信send short messages
- 大号tuba
- (翻译)信、达、雅"faithfulness, expressiveness and taste"
- 短号cornet
- 催款信call letter
- 货号article No.
- 去信write to
