... . 2. Appearance, ergonomic design, easy operation. 3. Imported closed compressor, high reliability, low noise. 4. Cold trap opening big, with samples ... , clean corrosion. 6. Patented design draft tube to improve the effective area of the cold trap, quick drying. 7. Imported inflation ... products or specific questions, pls not hesitated to contact me. High Cost Performance Ratio Vacuum Freeze Dryer