北京市朝阳循环经济产业园管理中心
beijing chaoyang circular economy industrial park management center
产品产量的优化组合
Optimization combination of product quantity
产品经理决策
Product manager decisions
产品品类选择准则
Product class’s choice criteria
产品品牌差异
product brand differentiation
产品品质及经济效益
quality and economical benefit of a product