[电] Chireix and Mesny directive antenna

xī lǐ méi ní zhǐ xiàng tiān xiàn ㄒㄧ ㄌㄧˇ ㄇㄟˊ ㄋㄧˊ ㄓˇ ㄒㄧㄤˋ ㄊㄧㄢ ㄒㄧㄢˋ