A device for sealing a passage against the escape of gases, especially a U-shaped or S-shaped bend in a drainpipe that prevents the return flow of sewer gas by means of a water barrier.

 
  • U字形或S字形隔臭管为防止气体漏逸而封堵一段通道的装置,尤指排水管中的U形管或S形弯管,它可以通过水的阻挡防止下水道气体倒流
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