The reason why the automatic exhaust valve failed to be used for air exhaust from siphon tube was investigated.

对自动排气阀不能用于虹吸管排气的理由进行了分析。

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The feasibility was discussed for the use of Venturi tube and automatic exhaust valve for expelling air from siphon tube.

探讨了虹吸管利用文氏管及自动排气阀排气的可行性。

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The utility model can effectively clear the blockage of the siphon tube of the closet, and has the advantages of simple structure, convenient installation and low cost.

本实用新型可以有效的清理马桶虹吸管的堵塞，具有结构简单，安装方便，成本低的优点。

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Meanwhile, the siphon tube that BP inserted into the leaking riser seems to have lost some effectiveness, as the recovery rate has fallen from 2, 100 bpd to 1, 360 bpd since last week.

FORBES: BP Spill Update: Endless Spill, Endless Blame