现有的空调维修工具
existing air conditioning service tool
现有的空压机带轮
existing air compressor pulley
现有的疫苗
currently available vaccines
在现有的数据库启用工作流程
enabling workflow services on an existing database
气象现象占有的面积
cover area of meteorological phenomena
现有产品的改良或修正
improvements in or revisions of existing products
不符规划现有用途
non-conforming existing use
固有的统计不确定性
inherent statistical uncertainty
固有的可选符记
inherently optional token