The aural warning devices unit M315 provide an alarm bell when detected indications occur in the flight deck.in the above sentence,what is the meaning of " aural warning devices"?
A.过热探测器
B.音响警告装置
C.天花板
D.固态电路板
正确答案是B
The aural warning devices unit M315 provide an alarm bell when detected indications occur in the flight deck.in the above sentence,what is the meaning of " aural warning devices"?
A.过热探测器
B.音响警告装置
C.天花板
D.固态电路板
正确答案是B