Pista of Smith & Loveless, USA and Jeta of Johns & Attword, UK are two types of grit chambers in round shape widely used recently.

• 美国Smith& Loveless公司的比氏(Pista)沉砂池和英国Jones& Attword公司的钟氏(Jeta)沉砂池是近年来应用日益广泛的两种圆形沉砂池.