| | | | | | | | | | | A | B | | C | | | | 1‰ | 20 | 200 20 ~ 40 40 | 300 | 40 ~ 60 60 500 | 60 ~ 80 80 | 700 80 ~ 100 | 100 900 | 100 100 | 1000 | | | | | | | | | | | | 1. | | | | | | | | | | | | | | | | | 2. | | | | 3 2024 5 6 11 | | | | | |