[电] compensated-loop direction finder
bǔ cháng huí lù shì fāng xiàng zhǎo xún qì ㄅㄨˇ ㄔㄤˊ ㄏㄨㄟˊ ㄌㄨˋ ㄕˋ ㄈㄤ ㄒㄧㄤˋ ㄓㄠˇ ㄒㄩㄣˊ ㄑㄧˋ