ring-blocking test 活塞环卡住试验
ciliary ring blocking 睫状环阻滞
blocking ring 挡圈
Upper blocking ring 上档块
seepage-blocking ring wall 截流环墙
It heats so quickly because the base of the Flash Java Kit's cup has a special ring that concentrates heat in addition to blocking wind.
WSJ: A Coffee Press for Campers
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