ULTRA.AIR filter Germany ULTRA.AIR model ULTRA.AIR price

The prototype of the ULTRA.AIR filter is a respiratory protective device used by people to protect their breathing. According to records, as early as the first century in Rome, workers used masks made of coarse linen for protection when purifying mercury. In the long period that followed, air filters also made progress, but they were mainly used as respiratory protective devices in some hazardous industries, such as the production of harmful chemicals. In l827, Brown discovered the movement laws of tiny particles, giving people a further understanding of the mechanism of air filtration. The rapid development of air filters is closely related to the military industry and