operation fee运行费用operationn.操作；运转；经营；行动；手术；运算；生效；（复）运筹学operation and maintenance center process操作和维护中心处理机operation controlled by extraction press排气压力控制操作Operation and Safety Improvement Program作业与安全改进计划operation mechanism of transforma-tion转化运行机制Operation for Safeguarding Jiaodong Area胶东保卫战operation of hydroelectric power station水电站运行调度Operation is simple and reproduceable.仪器操作简便，有良好的重复性。operation administration and maintenance运营维护管理operation amplifier / voltage balance运算放大器/均压Operation on multiple extraocular muscles多发性眼外肌手术