板式过滤器的外框为硬纸板，过滤材料为合成纤维过滤材料，折叠的滤料后面有金属网支撑。
Plate filters for the cardboard frame, filter material for synthetic fiber filter material, folding the filter material behind the wire mesh support.
板式过滤器的外框为硬纸板，过滤材料为合成纤维过滤材料，折叠的滤料后面有金属网支撑。
Plate filters for the cardboard frame, filter material for synthetic fiber filter material, folding the filter material behind the wire mesh support.
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