• 使用说明书

operation box操作框operationn.操作；运转；经营；行动；手术；运算；生效；（复）运筹学Operation on external ear外耳手术operation and development经营开发Operation on vas deferens输精管手术operation system auditing操作系统审计operation system and mode运行体制和模式Operation on carotid body颈动脉球手术operation at a high level高位运行operation in three shifts[化] 按三班操作operation system function操作系统功能operation system hardware运行系统硬件

1. A probe in a manual information retrieval operation that may be passed through holes or notches to assist in sorting or selecting cards.
   在手工信息检索操作中使用的一种金属针，可以穿过卡片小孔或切口，用来帮助对卡片进行排序或选择。