air lock

air-lock的词性：
n.（名词）

1. An airtight chamber, usually located between two regions of unequal pressure, in which air pressure can be regulated.
密封舱，压差隔离室：通常位于气压不同的两地之间的密封舱，气压在其中可以调节

2. A bubble or pocket of air or vapor, as in a pipe, that stops the normal flow of fluid through the conducting part.
气穴，气窝：在输送部分阻止液体正常流动的气泡或气窝，如在管道中