safety important item ==> 安全重要物项,属于某一安全组合的一部分和（或）其失效或故障可能导致对厂区人员或公众过量辐射照射的物项
双语例句
1
So research on the safety of side impact becomes an importantitem in the passive safety of the car.
因此，汽车侧面碰撞安全性的研究成为汽车被动安全性研究的一项重要内容。
2
Safety evaluation is an item of very important professional work, and the evaluation result is directly related to the immediate interests of banking financial institutions.
安全评估活动是一项十分重要的业务工作，评估的结果直接关系到银行业金融机构的切身利益。
3
Creepage distance is an important test item of safety test and international proficiency test.