滞止流 [流] stagnation flow

禁止流通物 res extra commercium ; a thing out of commerce

紧急止流阀 emergency stop valve

双向止流阀 double branch stop valve

禁止流通 non-negotiable

防止流感 prevent influenza ; Prevention of influenza ; To prevent the flu

停止流动 Stopped-flow

止流点 stagnation point

停止流动法 [物化] stopped flow method