JIS B 9908-1:2019 Test method of air filter units for ventilation and electric air cleaners for ventilation -- Part 1: Technical specifications, requirements and classification system based upon particulate matter efficiency
2019JIS B 9908-1:2019 Test method of air filter units for ventilation and electric air cleaners for ventilation -- Part 1: Technical specifications, requirements and classification system based upon particulate matter efficiency
2011JIS B 9908:2011 Test method of air filter units for ventilation and electric air cleaners for ventilation
2001JIS B 9908:2001 Test method of air filter units for ventilation and electric air cleaners for ventilation