precautionn.预防;预防措施
precautionary techniques防范技术
precautionary evacuation预防性撤离;预防性疏散
precautions against fire防火措施
precaution countermeasure防范对策
precautionary measurement防范对策
precautionary measurements防范措施
precautions before welding焊接前的预防措施
Precautionary health checkup健康检查
precaution against infection前农业部门
precautions for fire fighting[化] 消防安全措施