a device design for prevention
abortion prevention agents
abrasion prevention measure
Accident prevention
事故预防
意外的预防
事故防止
意外事故机率
预防事故
防灾机制
安全技术
安全预防
安全措施
事故防范
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