双筒过滤器滤芯21FC1424-140*200-1021FC1121-110系列承天倍达滤芯型号：21FC1121-110X160/2521FC1121-110X160/2021FC1121-110X160/1421FC1121-110X160/1021FC1121-110X160/621FC1121-110X160/421FC1121-60系列承天倍达滤芯型号：21FC1121-60X250/2521FC1121-60X250/2021FC1121-60X250/1421FC1121-60X250/1021FC1121-60X250/621FC1121-60X250/421FC1121-60X160/2521FC1121-60X160/20)