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Abstract factory mode refers to providing an interface to create a series of related or interdependent objects, so that clients can create product objects in multiple product families without specifying the specific type of products, emphasizing the change of "series objects". The main points of its implementation include:DragonSlayer.一个新的Y系列情景喜剧系列，打破了这个世界上所有的规则。将在今年四月扰乱所有人。快来加入这间很棒的公寓吧。一一将当年事情揭露，白凡虽然没有立即认罪，却笑对板栗道：王爷好手段。Backlog Parameter: Indicates the maximum number of unconnected queues to hold.JIT production is a unique multi-variety, small batch, high quality and low consumption manufacturing mode gradually established by Toyota Motor Company of Japan according to its own characteristics. The basic principle of JIT production comes from the management mode of supermarket on demand, that is, the supplier delivers the goods to the required place at the specified time according to the requirements of order summons (Kanban). That is to say, only at the "required time, supply the required quality and quantity of products", specifically, the quality, quantity and time of the products processed or supplied in each stage are determined by the demand in the next stage. Therefore, JIT production refers to a kind of production mode in which machines and equipment with strong versatility and high degree of automation are adopted at all levels of production organization, aiming at continuously reducing costs, no waste products and zero inventory. In short, in the face of the changing market, we should provide customers with the required products and services at the lowest possible cost, in accordance with the required quantity and with perfect quality, so as to meet the needs of customers to the greatest extent.