address filter unit的用法和样例：
- It is a thin type of fan filter unit ,like a screen .This unit has a distinctive function to prevent the infection being speared and to raise the cleanliness in local area .
- 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.
- The digital filtering unit employs moving average filter, by which the interference pulse can be well filtered, and thus the antijamming ability of the system is improved.
- The biodiesel production unit of claim 3, wherein said filtering unit comprises a settling tank.