Warning: file_put_contents(/www/wwwroot/ppbbu/laei.cn/cache/ef00554a57bd10a5c3c53be512ec480e.txt): failed to open stream: No space left on device in /www/wwwroot/ppbbu/laei.cn/index.php on line 58 direction finder英英字典_direction finder剑桥英语解释_direction finder柯林斯英文解释_按摩法牛津词典
1. N a highly directional aerial system that can be used to determine the direction of incoming radio signals, used esp as a navigation aid (尤用於導航設備中的)無線電測曏儀 (Abbreviation D/F, DF)