1921年紧急关税法案
Emergency Tariff Act of 1921
ATP紧急制动触发曲线
ATP emergency brake triggering curve
ESD紧急停车系统
ESD emergency stopping system
UPS紧急供电方案
classical swine fever virus shimen strain
闭环紧急控制
Closed-loop emergency control
避免紧急危难
to avert an imminent crisis