a device design for prevention
abortion prevention agents
abrasion prevention measure
Accident prevention
防灾机制
事故预防
预防事故
安全措施
安全预防
安全技术
事故防范
意外事故机率
事故防止
意外的预防
ACCIDENT PREVENTION AND CONTROL
accident prevention instruction
accident prevention measure
accident prevention model
accident prevention regulations
Active Collision prevention System
active disaster prevention and mitigation
Active intrusion prevention system
acute infectious disease prevention system
Ad Hoc Committee on the Prevention of Arms Race in Outer Space