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堵塞物；障碍物；堵塞
A blockage in a pipe, tube, or tunnel is an object which blocks it, or the state of being blocked.
例句
The logical treatment is to remove this blockage.
合理的治疗方法就是清除堵塞物。
...a total blockage in one of the coronary arteries.
其中一根冠状动脉的完全阻塞