120 Emergency Alarm System
120 Prehospital Emergency System
Abdominal surgical emergency
Ability of emergency management
Ability of emergency response
acceptable emergency dose
可接受的应急剂量
可容许剂量
事故容许剂量
可接受紧急事故剂量
Accident Emergency Response
accident emergency system
Acute abdominal emergency
additional emergency bilge suction pipe
Administrative emergency
administrative emergency power
aeronautical emergency frequency