Features：
- Batch preparation of sub-micron or nano-sized particles;
- Use of small beads 0.1-0.8mm as grinding media;
- Grinding barrel/agitator manufactured of hard alloy or ceramic as standard materials;
- Turbine-agitator with pins;
- Vacuum filtration for bead separation;
- Sealing-free without leakage;
- Circulation grinding in barrel to avoid foreign contamination;
- Easy operation and cleaning;
- Preparation of expensive and/or a small amount of sample.
