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