distress signal
短语词组
- parachute distress rocket signal 降落繖遇險火箭信號;跳繖火箭求救信號
- red star distress rocket signal 紅星遇險火箭信號
- pyrotechnical distress signal 菸火遇險信號
- misuse of distress signal 誤用遇險信號
- smoke distress signal 菸霧呼救信號
- plant distress signal 植物求救信號
- personal distress signal unit 珮帶者不適信號裝置
- automatic distress signal 自動遇險信號
- distress signal rocket [水運]遇險信號火箭 返回 distress signal