雪糕生命周期的产品开发：寻找并购买原料，原料再加工，研发并制作各种口味的雪糕，包装，出厂
w5l2-产品生命周期
Product Life Cycle Theory
The main idea is that the product cycle is an economic theory which explain the observed pattern of internation trade.The theory suggest that the product's life cycle all the parts and labor associated with product.
关键词：internation trade personal computer maturing product comparative advantage foreign demand standard product
文章链接：
https://en.m.wikipedia.org/wiki/Product_life-cycle_theory
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