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Various maintenance stations stockpile the Huai Hai engine service spare parts should for meet the user need the lowest reserve.
各维修站所储备的淮海发动机服务备件应为满足用户需求的最低库存量。
It included two parts. In first part a predator-prey model was proposed. Two stable states were obtained according to eclolgical data of panda and bawboo in area of Wolong Reserve.
包括两大部分:第一部分中,假设为捕食被捕食模型,根据在卧龙保护区收集的数据得到两个稳定态;
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