- 目視機(jī)體信號(hào)
- visual signal: 可見信號(hào); 目視信號(hào); 視覺號(hào)志; 視覺信號(hào); 視覺訊號(hào)
- audible and visual signal equipment: 聲光信號(hào)設(shè)備
- intermittent visual signal: 間歇發(fā)光信號(hào)
- prearranged visual signal: 預(yù)定的視覺信號(hào)
- quantized visual signal: 量化圖像信號(hào)
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