[电] beam primary antenna sy-stem
zhǐ xiàng yuán diàn lù tiān xiàn xì ㄓˇ ㄒㄧㄤˋ ㄩㄢˊ ㄉㄧㄢˋ ㄌㄨˋ ㄊㄧㄢ ㄒㄧㄢˋ ㄒㄧˋ