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封堵作业
1、operation───n.Cao作；经营；[外科]手术；[数][计]运算
2、strabismus operation───[医]斜视手术
3、operation manual───Cao作指南；Cao作手册；[计] Cao作指南，Cao作手册; [化] Cao作手册
4、operation management───运营管理；经营管理；Cao作管理
5、commercial operation───[经] 商业经营
6、heart operation───心脏手术
7、plugging into───把（电器）插头ChaRu；接通
8、plugging away───坚持不懈；顽强地致力于（坚定而缓慢地行走）
9、discontinued operation───[经] 停（中）止经营；停止经营
1、During water plugging operation, the key factor of success is how to protect non-target zones from pollution.───在堵水封窜作业中，如何保护非目的层不受污染，是施工成功与否的关键。
2、is blocked frequently when pipeline pigging, which will influence the normal operation due to severe plugging sometimes.───清管作业时清管器经常被卡堵，严重时会影响正常生产。
3、is pointed out that the plugging and freezing of breather valve, variation in parameters and operation conditions of oil tank and human factors result in the shrink of oil tank.───指出导致油罐抽瘪的主要原因是呼吸阀堵塞和冻结、油罐参数和工艺条件发生变化以及Cao作失误等。
4、Nursing for patients with micro wound no extracorporeal circulation atrial septal defect plugging operation───微创非体外循环房间隔缺损封堵术的护理
1、The packings serve the turn of big burthen operation and often plugging operation, and they especially serve the turn of heat exchange operation in tower.