| Item | Item Technical Parameters |
| Flowmeter range |
0 L/min~100L/min |
| Flowmeter range accuracy |
±2% |
| Micro-pressure measuring range |
-1000Pa~1000Pa |
| Micromanomet er accuracy |
1Pa |
| Pumping capacity of suction |
Not less than 100L / min |
| Ventilation | Constant (85 ± 1) L / min |

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