短語詞組短語laser beacon frequency locking 激光信標鎖頻search and rescue beacon frequency 搜救信標頻率frequency beacon 信標頻率low frequency beacon 低頻信標;繙譯;低頻信標英語dual frequency beacon 雙頻信標double frequency beacon [測]雙頻信標LFB Low Frequency Beacon 低頻信標radio -frequency beacon 射頻信標機double e frequency beacon 雙頻信標 返回 beacon frequency