creation and annihilation operator  升降算子

inverse and dual combination operator  逆序与对偶组合算子

Operation and Evaluation of Composite Insulator  复合绝缘子运行与评价

Radar operation and simulator specialized training  雷达操作与模拟器专业培训

Adjustment and Operation  调试运行; 调试与运行

advertisement operation and marketing  广告运作与营销的关系

AND operation  与运算; 与操作; AND运算; 及运算

and Operation control  运行控制

and Operation safety  行车安全

AND-operation  与操作

Automation and operation  自动业务化

Base Station System Operation and Maintenance Application Part BSSOMAP  基站子系统操作与维护应用部分

basic theory and operation  三基

boiler design and operation  锅炉设计和运行

boiler’s design and operation  设计参数和运行参数

BSS Operation and Maintenance Application Part BSSOMAP  BSS操作维护应用部分

Building and Operation  建设运行; 建设运营

Business and Operation  业务运营

Business and Operation Support System  业务运营支撑系统