备件库存管理的(s,s)策略实现，模型为随机模型-Spare parts inventory management (s, s) policy implementation, the model for the stochastic model

用vb编写的通用库存管理系统,很好的,可以用做毕业设计的哦！-General inventory management system, using vb to write a good, can be used for graduation design!