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