what does "地面勤务选择继电器" mean in English ?
A.ground service select relay
B.ground service transfer relay
C.ground handling relay
D.ground service relay
正确答案是A
what does "地面勤务选择继电器" mean in English ?
A.ground service select relay
B.ground service transfer relay
C.ground handling relay
D.ground service relay
正确答案是A