Can be tested at multiple stations according to customer requirements, negative pressure, positive pressure, air tightness tester, multi-station test can be customized according to customer requirements The airtightness of non-standard breathing valves for self-priming filter anti-particulate respirators detection. Applicable to labor safety protection inspection centers, occupational safety inspection centers, disease prevention and control centers, respirator manufacturers, etc. https://www.testerinlab.com/news/704.html