2020 | | 2021 7 20 | | | 2020 | | | | | | | | | | | 2020 | | | | 2020 | 99% 2 | 90% PM 2.5 | 10 / | 35 | | | | | | 8 | | | 97% | 85 % | 75 % 75% | 82% | | 100% 95% | | | | | | | | 2020 | | | | 100 % | | | | | | | | | | | | | | | 2 | 1 1 | | | | | | | | | | | | | | | | 12 | | 10 / h | 2020 | | | | | 20 | VOCs | 67 | 14 48 | | | | | | OBD | 895 | 99.8% | | | | | | | | | | | | | | 4 | | | 2 | | | | | | | 26 | | | | | | | | | 17 | | | | | 15 | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | 8 | | | | | | | 2 | | | | | | | 2 | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | |