ICS 65.020.20 B 61 : DB46 DB 46/T 486—2019 2019-11-20 2020- 01 - 01 DB 46/T 486 2019 ............................................................................. III 1 .............................................................................. 1 2 .................................................................... 1 3 ........................................................................ 1 3.1 3.2 3.3 3.4 3.5 3.6 4 ........................................................................ .......................................................................... .......................................................................... .................................................................... .......................................................................... .......................................................................... 1 2 2 2 2 2 .................................................................. 2 4.1 4.2 5 .................................................................... 2 ...................................................................... 2 ................................................................ 2 5.1 5.2 5.3 5.4 5.5 .......................................................................... ...................................................................... ................................................................ ............................................................ .......................................................................... 2 3 3 3 3 6 ........................................................................ 3 7 .......................................................................... 4 7.1 7.2 7.3 7.4 ...................................................................... ...................................................................... ................................................................ ...................................................................... 4 4 4 4 8 .......................................................................... 4 9 .................................................................... 4 10 ................................................................... 5 10.1 10.2 10.3 10.4 11 ..................................................................... ..................................................................... ..................................................................... ..................................................................... 5 5 5 5 ............................................................................. 5 I DB 46/T 486 2019 11.1 11.2 11.3 11.4 11.5 11.6 12 ...................................................................... 5 .................................................................... 6 ...................................................................... 6 .................................................................... 6 ...................................................................... 6 .......................................................................... 6 .......................................................................... 7 12.1 12.2 12.3 12.4 13 ...................................................................... 7 ............................................................ 7 ...................................................................... 7 ...................................................................... 7 ........................................................................ 7 13.1 13.2 13.3 13.4 13.5 13.6 13.7 ................................................................ 7 ...................................................................... 7 ...................................................................... 8 ...................................................................... 8 ...................................................................... 8 ...................................................................... 8 ...................................................................... 8 14 .............................................................................. 8 15 .......................................................................... 8 ........................................... 9 ........................................ 10 II DB 46/T 486 2019 GB/T 1.1 2009 III DB 46/T 486 2019 1 2 GB/T 8321 GB 12475 G