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B