maintained维护
maintainvt.维持;维修;保养;坚持;断言
maintain a road or railway养路
maintain proper air purity保持适当的空气纯度
Maintain Visual Separation保持目视间隔
maintaining the status quo维护现状
maintainability allocation维修性分配
maintaining and management养护管理
maintainability evaluation维修性鉴定
maintain a strict standard把关
Maintainability constraint维修性约束
maintaining and developing传承