Once people are no longer allowed to breathe like humans, (nano) technology can help:
Zoz-FFP2-SM/SL
2 Mio pc. FFP2 standard for the State NRW
Early 2020, from China to Germany.
Once people are no longer allowed to breathe like humans, (nano) technology can help:
Zoz-FFP2-SM/SL
2 Mio pc. FFP2 standard for the State NRW
Early 2020, from China to Germany.