“堵塞的”用英语怎么说？

氧化胆固醇可能是造成动脉堵塞的元凶。Oxidized cholesterol may be responsible for furring up the arteries.他能清理堵塞的排水沟。He can clear blocked drains.轮机组都起劲地埋头修理堵塞的阀门.The engineering gang fell earnestly to work on jammed valves....