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- 求援信号装置<呼吸器具佩带者携带的一种手动装置distress signal warning device
- 你可以通过无线电发出求援信号。You can send out a call for help over the radio.
- 装置system
- 布朗装了一部有效范围为二百五十英里的无线电收发报机，以便查对他们的位置，还可以在万一被迫降落时发出 sos求援信号。Brown had rigged a wireless set with a 250-mile range. With it, they could check their position and, if they were forced down, spell out an SOS.
- 信号signal
- 道路车辆。控制装置、指示器和信号装置用符号。修改件2Road vehicles - Symbols for controls, indicators and tell-tales; Amendment 2
- 信号装置signal fixture
- 数字信号digital signal
- 清管器信号装置go-devil signaller
- 发信号装置signaling device
- 光信号装置optical signal device
- 声信号装置[计] beeper
- 远距信号装置remote signalling
- 水量信号装置Water flow rate measuring apparatus
- 通知信号装置alertor
- 中央信号装置central signal device
- 终端信号装置terminating signaling unit
- 自动信号装置automatic signalling
- 车内信号装置cab singaling equipment
- 初始信号装置initial signal unit
