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2
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。
3
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.