任务特性................................................................................................4-1 准备情况......................................................................................................4-3 事故优先级...................................................................................................4-4 现场安全和保障................................................................................................4-6 净化................................................................................................................4-8 污染控制......................................................................................................4-9 环境考虑......................................................................................................4-9 密闭空间作业......................................................................................................4-10 终止事故......................................................................................................4-11