sub-quality product的用法和样例：
例句
- With the high quality and excellent service of its products as well as the guarantee of exchanging any unqualified product, Xin Li has built good reputation among customers.
从严生产，从优服务，严格做到不合格产品不发运，不合格产品包退换的服务准则，由此树立了品牌的良好声誉。 - The inspector performs incoming, inprocess, fininal inspection to ensure quality products are shipped to globe customers.
负责进料检验，过程检验，出货检验，确保合格产品发送至全球客户。
