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堵塞物；障礙物；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.
合理的治療方法就是清除堵塞物。
...a total blockage in one of the coronary arteries.
其中一根冠狀動脈的完全阻塞