白牌手机制造商享有成本优势，因为它们不做任何产品安全测试，也不提供任何担保或售后服务。

Whitebox manufacturers enjoy a cost advantage as they do not do any product safety tests and do not offer any guarantees or after-sales service.

youdao

先进的专业技术、高质量的设备和工程是我公司的优势，完善的售后服务体系是客户的保障。

The advanced professional technology, high quality equipment and engineering is our advantage, and perfect after-sales service system is the guarantee of customers.

youdao

通过经营管理、品牌优势及完善的售前、售中售后服务、努力将公司建设成行业龙头企业。

Through the operation and management, brand advantage and improve pre-sales, sale of after-sales service, the efforts of the company into the industry leading enterprises.

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