求翻译：工作前，要在射线有效的辐射范围内拉设警戒线，在各个路口醒目的位置挂设“射线危险”的警示牌，必要时要派专人看管，劝阻施工人员及其他人员进入射线的有效辐射区。是什么意思？

Before work to pull ray radiation within established cordon based ray danger "warning signs hanging in the eye-catching position of each intersection, if necessary, to send someone to look after, to discourage the construction workers and other personnel to enter the active radiation ray District.

Before working in the beam of radiation effectively set up within each line, and the intersection of the catching position in the dangerous rays of the warning signs and, if necessary, to send someone to discourage construction supervision and other personnel to enter the effective radiation beam.

Prior-Ray install in the context of effective radiation warning line