双层滤料
dual-layer filter material
石英砂滤料
Quartz sand straining material
人造滤料
artificial filtering material
轻质滤料
light-weight filter media
气态汞净化滤料
air Hg purification filter material
耐高温滤料
high temperature resistance filtration material
滤料组合
the combination of filter materials
滤料选择
selection of filtering material