Ore-forming fluid , mineralizing agent , auxiliary aget came mainly from the mixing of deep-source bittern , formation water , palaeometeoric water .

含矿流体、矿化剂、助溶剂是深源卤水、建造水、大气降水的混合。

Three kinds of maintenance policies are considered based on the failure number N for the component 1 , the working ageT and ( N , T ) . the explicit expressions of the long-run expected downtime for repair equipment per unit time on each maintenance policy are derived .

分别以系统中部件1故障次数N，工作时间T和（N，T）为维修策略，求出修理设备经长期运行单位时间内平均停工时间表达式。