The supplier and the seller does not permit the stockout, the goods demand is the periodic demand, the supplier orders to the exterior supplier, the delivery cycle is a constant;
应
和销售都不允许缺货，物品
为周期性，应向外部应订货，交付周期是
；
The supplier and the seller does not permit the stockout, the goods demand is the periodic demand, the supplier orders to the exterior supplier, the delivery cycle is a constant;
应和销售都不允许缺货，物品为周期性，应向外部应订货，交付周期是；
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