欧美亚洲日韩国产综合一级_日韩人妻无码精品_成视频在线观看免费观看_国产蜜臀AV后入第一视角_丝袜国产欧美亚洲精品a_免费A∨在线永久在线观看_午夜福利精品一区_片多多app免费观看高清影视_免费午夜视频无码无需下载_国产成人综合亚洲网址

1. Three-guarantee shall be implemented for the ventilator within a year (since the delivery day). Within the three-guarantee period, the user shall correctly use the ventilator according to requirements in the instructions. In case of any failure, it will be repaired for free. Long-term warranty shall be provided after three-guarantee period.

2. The after-sales service response time shall be within 48 hours after the telephone is received.