folder filter

• 折叠式滤清器

folder filter的用法和样例：

例句

1. 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。