maintenance log保养时程表
maintenancen.维修;维护;保持;生活费用;抚养费
maintenance and repairs保养及修理
maintenance application护养施肥
maintenance expendituse维修费;维修开支
Maintenance Test Module保养测试模件
maintenance and support维修保障
maintenance of nitrogen氮保存,氮的保存
Maintenance Data Report维修数据报告
maintenance supervision维护管理程序
maintenance signal unit维护信号装置
maintenance of waterway航道维护