求翻译：D、 保修期内确因机组质量问题而引起运行故障，负责免费进行维修；保修期外，根据用户要求定期对机组进行维护保养，实行终身维护是什么意思？

D, the warranty period is indeed due to quality problems caused by the unit operational failure, responsible for free repair; warranty period, according to user require regular maintenance on the unit, the implementation of life-long maintenance

Warranty Period * , D due crew quality issues arising from malfunctions and is responsible for carrying out maintenance free; warranty, according to the requirements of customers regularly for the crew to pursue life-long maintenance repair and maintenance,

D, In the warranty period firmly causes the movement breakdown because of the unit quality question, is responsible to carry on the service free; Outside the warranty period, regularly carries on the maintenance maintenance according to the user request to the unit, implements the lifelong maintenan

D, warranty unit malfunction caused by quality problems, for free repairs; outside the warranty period, according to user requirements regularly maintenance unit, pursue life-long maintenance

D, warranty unit malfunction caused by quality problems, for free repairs; outside the warranty period, according to user requirements regularly maintenance unit, pursue life-long maintenance