Operation era经营时代operationn.操作；运转；经营；行动；手术；运算；生效；（复）运筹学operation motivation作业动因operation per minute每分钟操作次数operation parameters操作参数operation side frame操作侧机架operation conception经营理念operation automation操作自动化operation mimorandum操作备忘录Operation on bladder膀胱手术operation flow sheet操作顺序图Operation Overflightn.飞越计划