| ︹ 2020 ︺ 1 | | | | | | 2020 | | 5700 | 51 | | | | 2020 | 5700 1500 \ | 855 | 1200 | 1790 | | 876 | 204 | 300 | 370 | 280 | 280 | 400 | | | | GB/T15776 2016 2019 2020 | | 2020 | | | 2020 | 5100 100 | 51 | 7 | 700 | 3 | 300 | 2 | 200 | 5 | 500 | 2 | 200 | 4 | 400 | 2 | 200 | 4 | 400 | 4 | 400 | 4 | 400 2 | | 200 | 4 | 400 | 4 | 400 | 4 | 400 | | | | | | | | | | | | | | 2020 | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | GB/T15776 2016 | | | | | GB/T15776 2016 | | | | | | | | | | | | | | | | | | | GPS | | | 85% | | | | | | | | | | | | | | | 2020 3 11 | | |