1. **Assembly**: The assembly is made from modified engineering materials, ensuring durability and long-lasting performance.  
2. **Pre-filter and Main Filter Integrated Design**: The compact structure combines both the pre-filter and main filter in one unit, making installation easier and allowing for interchangeable air outlet directions.  
3. **Improved Cyclone Tube Blade Angle**: The optimized blade angle of the cyclone tube enhances the coarse filtration efficiency to as high as 98.9%, significantly extending the filter element's service life.  
4. **Main Filter Element Material**: The main filter element is made of nanofiber filter paper, offering high dust-holding capacity, low resistance, and high efficiency, with an overall filtration efficiency of up to 99.99%.  
5. **Dust Discharge**: The dust discharge is sealed with a threaded cap, making the process quicker and more efficient, improving overall working efficiency.