The stability of a three species food chain system is discussed, in which the growth of producer is subject to the linear initial regrowth model.
讨论了生产者服从草再生模型的三种群食物链系统平衡点的稳定性问题。
Food packing paper box transducer is one kind of request health condition higher system, therefore used the new hygienic condition good to model the steel conveyer to compose this system.
食品包装纸箱传送系统是一种要求卫生条件较高的系统，故采用了新型的卫生条件好的塑钢传送机来组成该系统。
The utility model provides a food sterilizing cabinet with air wet removing, which is mainly composed of a control circuit and an air closed-circuit circulation system.
本实用新型提供了一种空气去湿食品消毒柜，它主要由控制电路和空气闭路循环系统组成。
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