maintenancefreeadj.不需维护的
maintenancen.维修;维护;保持;生活费用;抚养费
maintenance problem维修问题
maintenance measure养护对策
maintenance factory维修厂
maintenance message维护信息
maintenance protein维持蛋白
maintenance of road养路
maintenance mistake维修差错
maintenance channel维护通道
maintenance guiding维修诱导
maintenance runaway维修用通道