maintainvt.维持;维修;保养;坚持;断言
maintain an unbeaten record保持不败
maintain a facade of wealth保持富有的门面
maintainability requirement维修性要求
Maintaining concrete sleeper混凝土轨枕养护
Maintain Visual Flight Rules保持目力飞行规则
maintainability distribution维修性分配
maintainability verification可维护性核验
maintaining basic cost model维护基本成本模型
maintainance servicing agent维修服务商
maintained emergency lighting常开应急照明装置