单词：folder filter
folder filter的用法和样例：
例句
- The fold cartridge filter unit was developed by adopting hitech membrane material, and then a new type of gassolid separation equipment was made up with it.采用高科技膜材料研究制成折叠式滤筒过滤单元，并组合形成一种新型的气固分离设备。
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