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产品更新换代周期_____________________________________________________
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产品的售后服务和技术支持_____________________________________________
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产品销售成本的构成及销售价格制订的依据_______________________________
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产品形成规模销售时,毛利润率为____________%,纯利润率为____________%
如果产品已经在市场上形成了竞争优势,请说明与哪些因素有关(如成本相同但销售价格低、成本低形成销售价格优势、以及产品性能、品牌、销售渠道优于竞争对手产品,等等)_______________________________________________
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