operation van作业车operationn.操作；运转；经营；行动；手术；运算；生效；（复）运筹学operation duration手术时间operation progress操作进展operation criteria手术指征operation security安全生产operation decision经营决策operation on graph图上运算operation decorder操作译码器operation features运行特点Operation matching手术配合operation research运筹学; 营业研究; 操作研究