Be responsible for product installing, trying and training and implement "Three guarantees", free maintain of one year and forever technique service.

负责产品安装、调试、培训；实行“三包”，保修一年和终身技术服务。

youdao

Be responsible for product installing, trying and training and implement "Three guarantees", free maintain of one year and forever technique service.

负责产品安装、调试、培训；实行“三包”，保修一年和终身技术服务。

youdao