One example of a main category might be customer, and subcategories for customer might be high-value and low-value.
主类别的一个示例可以是customer，而customer的子类别可能是high -value和low - value。
With a sincere heart to be economical, low carbon efficient type procucts to each customer, to create value for customers;
以真诚心将经济节约型、低碳高效型的产品带给每个客户，为客户创造价值；
With masterful technology and innovative ideas, our factory always provides low price and high quality products and high value-added services to customer.
凭着精湛工艺和勇于创新的理念，我厂一直为客户提供价廉质优的产品和高附加值的优质服务。
Our promise: "FOR customer service" as the frist aim to provide customers with products of high value and low-price;
我们承诺：“为客户服务”为第一宗旨向顾客提供高价值低价位产品；
Our promise: "FOR customer service" as the frist aim to provide customers with products of high value and low-price;
我们承诺：“为客户服务”为第一宗旨向顾客提供高价值低价位产品；
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