Hodnocení | Remanence | Vnitřní koercitivita | Coercitivity | Maximální energetický produkt | Hustota | Propustnost zpětného rázu | Teplotní koeficient | Maximální provozní teplota | |||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
T | KGS | Ka/m | Koi | Ka/m | Koi | KJ/m3 | MGOE | G/cm 3 | αBr | αHCJ | °C (L/D = 0,7) | ||||||
Maximální hodnota | Min | Maximální hodnota | Min | Min | Min | Min | Min | Maximální hodnota | Min | Maximální hodnota | Min | Min | %/°C | %/°C |
N56 | 1.51 | 1.47 | 15.1 | 14.7 | 796 | 10 | 836 | 10.5 | 446 | 414 | 56 | 52 | 7.50 | 1.05 | -0.12 | -0.76 | 80 |
N54 | 1.49 | 1.45 | 14.9 | 14.5 | 876 | 11 | 836 | 10.5 | 438 | 406 | 55 | 51 | 7.50 | 1.05 | -0.12 | -0.76 | 80 |
N52 | 1.46 | 1.42 | 14.6 | 14.2 | 955 | 12 | 836 | 10.5 | 422 | 390 | 53 | 49 | 7.50 | 1.05 | -0.12 | -0.76 | 80 |
N50 | 1.44 | 1.39 | 14.4 | 13.9 | 955 | 12 | 860 | 10.8 | 406 | 374 | 51 | 47 | 7.50 | 1.05 | -0.12 | -0.76 | 80 |
N48 | 1.43 | 1.37 | 14.3 | 13.7 | 955 | 12 | 860 | 10.8 | 390 | 358 | 49 | 45 | 7.50 | 1.05 | -0.12 | -0.76 | 80 |
N45 | 1.37 | 1.32 | 13.7 | 13.2 | 955 | 12 | 860 | 10.8 | 366 | 342 | 46 | 43 | 7.50 | 1.05 | -0.12 | -0.76 | 80 |
N42 | 1.32 | 1.28 | 13.2 | 12.8 | 955 | 12 | 860 | 10.8 | 342 | 318 | 43 | 40 | 7.50 | 1.05 | -0.12 | -0.76 | 80 |
N40 | 1.28 | 1.25 | 12.8 | 12.5 | 955 | 12 | 860 | 10.8 | 326 | 302 | 41 | 38 | 7.50 | 1.05 | -0.12 | -0.76 | 80 |
N38 | 1.25 | 1.22 | 12.5 | 12.3 | 955 | 12 | 860 | 10.8 | 310 | 287 | 39 | 36 | 7.50 | 1.05 | -0.12 | -0.76 | 80 |
N35 | 1.22 | 1.17 | 12.2 | 11.7 | 955 | 12 | 860 | 10.8 | 287 | 263 | 36 | 33 | 7.50 | 1.05 | -0.12 | -0.76 | 80 |
N33 | 1.17 | 1.13 | 11.7 | 11.3 | 955 | 12 | 836 | 10.5 | 271 | 247 | 34 | 31 | 7.50 | 1.05 | -0.12 | -0.76 | 80 |
N30 | 1.13 | 1.08 | 11.3 | 10.8 | 955 | 12 | 796 | 10.0 | 247 | 223 | 31 | 28 | 7.50 | 1.05 | -0.12 | -0.76 | 80 |
260 m | 1.50 | 1.47 | 15.0 | 14.7 | 1035 | 13 | 995 | 12.5 | 438 | 406 | 55 | 51 | 7.50 | 1.05 | -0.12 | -0.68 | 100 |
540 m | 1.49 | 1.44 | 14.9 | 14.4 | 1114 | 14 | 995 | 12.5 | 430 | 398 | 54 | 50 | 7.50 | 1.05 | -0.12 | -0.68 | 100 |
52 m | 1.46 | 1.42 | 14.6 | 14.2 | 1114 | 14 | 1035 | 13.0 | 422 | 390 | 53 | 49 | 7.50 | 1.05 | -0.12 | -0.68 | 100 |
50 m | 1.44 | 1.39 | 14.4 | 13.9 | 1114 | 14 | 1035 | 13.0 | 406 | 374 | 51 | 47 | 7.50 | 1.05 | -0.12 | -0.68 | 100 |
48 m | 1.42 | 1.37 | 14.2 | 13.7 | 1114 | 14 | 1027 | 12.9 | 390 | 358 | 49 | 45 | 7.50 | 1.05 | -0.12 | -0.68 | 100 |
420 m | 1.37 | 1.32 | 13.7 | 13.2 | 1114 | 14 | 995 | 12.5 | 366 | 342 | 46 | 43 | 7.50 | 1.05 | -0.12 | -0.68 | 100 |
42 m | 1.32 | 1.28 | 13.2 | 12.8 | 1114 | 14 | 955 | 12.0 | 342 | 318 | 43 | 40 | 7.50 | 1.05 | -0.12 | -0.68 | 100 |
40 m | 1.28 | 1.25 | 12.8 | 12.5 | 1114 | 14 | 923 | 11.6 | 326 | 302 | 41 | 38 | 7.50 | 1.05 | -0.12 | -0.68 | 100 |
380 m | 1.25 | 1.22 | 12.5 | 12.3 | 1114 | 14 | 899 | 11.3 | 310 | 287 | 39 | 36 | 7.50 | 1.05 | -0.12 | -0.68 | 100 |
35 m | 1.22 | 1.17 | 12.2 | 11.7 | 1114 | 14 | 868 | 10.9 | 287 | 263 | 36 | 33 | 7.50 | 1.05 | -0.12 | -0.68 | 100 |
333 m | 1.17 | 1.13 | 11.7 | 11.3 | 1114 | 14 | 836 | 10.5 | 271 | 247 | 34 | 31 | 7.50 | 1.05 | -0.12 | -0.68 | 100 |
30 m | 1.13 | 1.08 | 11.3 | 10.8 | 1114 | 14 | 796 | 10.0 | 247 | 223 | 31 | 28 | 7.50 | 1.05 | -0.12 | -0.68 | 100 |
54 h | 1.49 | 1.44 | 14.9 | 14.4 | 1273 | 16 | 1059 | 13.3 | 430 | 398 | 54 | 50 | 7.50 | 1.05 | -0.12 | -0.66 | 120 |
52 h | 1.46 | 1.42 | 14.6 | 14.2 | 1353 | 17 | 1059 | 13.3 | 422 | 382 | 53 | 48 | 7.50 | 1.05 | -0.12 | -0.66 | 120 |
50 h | 1.44 | 1.39 | 14.4 | 13.9 | 1353 | 17 | 1043 | 13.1 | 406 | 374 | 51 | 47 | 7.50 | 1.05 | -0.12 | -0.66 | 120 |
48 hodin | 1.42 | 1.36 | 14.2 | 13.6 | 1353 | 17 | 1027 | 12.9 | 390 | 358 | 49 | 45 | 7.50 | 1.05 | -0.12 | -0.66 | 120 |
45 h | 1.37 | 1.32 | 13.7 | 13.2 | 1353 | 17 | 995 | 12.5 | 366 | 342 | 46 | 43 | 7.50 | 1.05 | -0.12 | -0.66 | 120 |
42 h | 1.32 | 1.28 | 13.2 | 12.8 | 1353 | 17 | 955 | 12.0 | 342 | 318 | 43 | 40 | 7.50 | 1.05 | -0.12 | -0.66 | 120 |
40 hodin | 1.28 | 1.25 | 12.8 | 12.5 | 1353 | 17 | 923 | 11.6 | 326 | 302 | 41 | 38 | 7.50 | 1.05 | -0.12 | -0.66 | 120 |
38h | 1.25 | 1.22 | 12.5 | 12.3 | 1353 | 17 | 899 | 11.3 | 310 | 287 | 39 | 36 | 7.50 | 1.05 | -0.12 | -0.66 | 120 |
35 h | 1.22 | 1.17 | 12.2 | 11.7 | 1353 | 17 | 868 | 10.9 | 287 | 263 | 36 | 33 | 7.50 | 1.05 | -0.12 | -0.66 | 120 |
33 h | 1.17 | 1.13 | 11.7 | 11.3 | 1353 | 17 | 836 | 10.5 | 271 | 247 | 34 | 31 | 7.50 | 1.05 | -0.12 | -0.66 | 120 |
30 h | 1.13 | 1.08 | 11.3 | 10.8 | 1353 | 17 | 796 | 10 | 247 | 223 | 31 | 28 | 7.50 | 1.05 | -0.12 | -0.66 | 120 |
52SH | 1.46 | 1.42 | 14.6 | 14.2 | 1512 | 19 | 1059 | 13.3 | 422 | 390 | 53 | 49 | 7.50 | 1.04 | -0.115 | -0.56 | 150 |
50sh | 1.42 | 1.39 | 14.2 | 13.9 | 1592 | 20 | 1043 | 13.1 | 406 | 374 | 51 | 47 | 7.50 | 1.04 | -0.115 | -0.56 | 150 |
48SH | 1.40 | 1.36 | 14.0 | 13.6 | 1592 | 20 | 1035 | 13.0 | 390 | 358 | 49 | 45 | 7.50 | 1.04 | -0.115 | -0.56 | 150 |
45SH | 1.37 | 1.32 | 13.7 | 13.2 | 1592 | 20 | 995 | 12.5 | 366 | 342 | 46 | 43 | 7.50 | 1.04 | -0.115 | -0.56 | 150 |
42SH | 1.32 | 1.28 | 13.2 | 12.8 | 1592 | 20 | 955 | 12.0 | 342 | 318 | 43 | 40 | 7.50 | 1.04 | -0.115 | -0.56 | 150 |
40sh | 1.28 | 1.25 | 12.8 | 12.5 | 1592 | 20 | 939 | 11.8 | 326 | 302 | 41 | 38 | 7.50 | 1.04 | -0.115 | -0.56 | 150 |
38SH | 1.25 | 1.22 | 12.5 | 12.2 | 1592 | 20 | 907 | 11.4 | 310 | 287 | 39 | 36 | 7.50 | 1.04 | -0.115 | -0.56 | 150 |
35SH | 1.22 | 1.17 | 12.2 | 11.7 | 1592 | 20 | 876 | 11.0 | 287 | 263 | 36 | 33 | 7.50 | 1.04 | -0.115 | -0.56 | 150 |
33SH | 1.17 | 1.13 | 11.7 | 11.3 | 1592 | 20 | 844 | 10.6 | 271 | 247 | 34 | 31 | 7.50 | 1.04 | -0.115 | -0.56 | 150 |
30sh | 1.13 | 1.08 | 11.3 | 10.8 | 1592 | 20 | 804 | 10.1 | 247 | 223 | 31 | 28 | 7.50 | 1.04 | -0.115 | -0.56 | 150 |
50 sht | 1.42 | 1.39 | 14.2 | 13.9 | 1671 | 21 | 1043 | 13.1 | 406 | 374 | 51 | 47 | 7.50 | 1.04 | -0.115 | -0.53 | 160 |
48sht | 1.40 | 1.36 | 14 | 13.6 | 1751 | 22 | 1031 | 12.9 | 390 | 358 | 49 | 45 | 7.50 | 1.04 | -0.115 | -0.53 | 160 |
45 | 1.37 | 1.32 | 13.7 | 13.2 | 1751 | 22 | 1003 | 12.6 | 366 | 342 | 46 | 43 | 7.50 | 1.04 | -0.115 | -0.53 | 160 |
42 | 1.32 | 1.28 | 13.2 | 12.8 | 1751 | 22 | 971 | 12.2 | 342 | 318 | 43 | 40 | 7.50 | 1.04 | -0.115 | -0.53 | 160 |
40sht | 1.28 | 1.25 | 12.8 | 12.5 | 1751 | 22 | 947 | 11.9 | 326 | 302 | 41 | 38 | 7.50 | 1.04 | -0.115 | -0.53 | 160 |
38sht | 1.25 | 1.22 | 12.5 | 12.2 | 1751 | 22 | 923 | 11.6 | 310 | 287 | 39 | 36 | 7.50 | 1.04 | -0.115 | -0.53 | 160 |
35 | 1.22 | 1.17 | 12.2 | 11.7 | 1751 | 22 | 884 | 11.1 | 287 | 263 | 36 | 33 | 7.50 | 1.04 | -0.115 | -0.53 | 160 |
33 sht | 1.17 | 1.13 | 11.7 | 11.3 | 1751 | 22 | 860 | 10.8 | 271 | 247 | 34 | 31 | 7.50 | 1.04 | -0.115 | -0.53 | 160 |
30 | 1.13 | 1.08 | 11.3 | 10.8 | 1751 | 22 | 812 | 10.2 | 247 | 223 | 31 | 28 | 7.50 | 1.04 | -0.115 | -0.53 | 160 |
48UH | 1.40 | 1.36 | 14.0 | 13.6 | 1910 | 24 | 1031 | 12.9 | 390 | 358 | 49 | 45 | 7.55 | 1.03 | -0.11 | -0.50 | 180 |
45UH | 1.36 | 1.32 | 13.6 | 13.2 | 1990 | 25 | 1003 | 12.6 | 366 | 342 | 46 | 43 | 7.55 | 1.03 | -0.11 | -0.50 | 180 |
42UH | 1.32 | 1.28 | 13.2 | 12.8 | 1990 | 25 | 971 | 12.2 | 342 | 318 | 43 | 40 | 7.55 | 1.03 | -0.11 | -0.50 | 180 |
40UH | 1.28 | 1.25 | 12.8 | 12.5 | 1990 | 25 | 923 | 11.6 | 326 | 302 | 41 | 38 | 7.55 | 1.03 | -0.11 | -0.50 | 180 |
38UH | 1.25 | 1.22 | 12.5 | 12.2 | 1990 | 25 | 907 | 11.4 | 310 | 287 | 39 | 36 | 7.55 | 1.03 | -0.11 | -0.50 | 180 |
35UH | 1.22 | 1.17 | 12.2 | 11.7 | 1990 | 25 | 860 | 10.8 | 287 | 263 | 36 | 33 | 7.55 | 1.03 | -0.11 | -0.50 | 180 |
33 uh | 1.17 | 1.13 | 11.7 | 11.3 | 1990 | 25 | 852 | 10.7 | 271 | 247 | 34 | 31 | 7.55 | 1.03 | -0.11 | -0.50 | 180 |
30 uh | 1.13 | 1.08 | 11.3 | 10.8 | 1990 | 25 | 812 | 10.2 | 247 | 223 | 31 | 28 | 7.55 | 1.03 | -0.11 | -0.50 | 180 |
45UHT | 1.36 | 1.32 | 13.6 | 13.2 | 2069 | 26 | 1003 | 12.6 | 366 | 342 | 46 | 43 | 7.55 | 1.03 | -0.11 | -0.48 | 190 |
42UHT | 1.32 | 1.28 | 13.2 | 12.8 | 2149 | 27 | 971 | 12.2 | 342 | 318 | 43 | 40 | 7.55 | 1.03 | -0.11 | -0.48 | 190 |
40UHT | 1.28 | 1.25 | 12.8 | 12.5 | 2149 | 27 | 947 | 11.9 | 326 | 302 | 41 | 38 | 7.55 | 1.03 | -0.11 | -0.48 | 190 |
38UHT | 1.25 | 1.22 | 12.5 | 12.2 | 2149 | 27 | 923 | 11.6 | 310 | 287 | 39 | 36 | 7.55 | 1.03 | -0.11 | -0.48 | 190 |
35UHT | 1.22 | 1.17 | 12.2 | 11.7 | 2149 | 27 | 884 | 11.1 | 287 | 263 | 36 | 33 | 7.55 | 1.03 | -0.11 | -0.48 | 190 |
33UHT | 1.17 | 1.13 | 11.7 | 11.3 | 2149 | 27 | 860 | 10.8 | 271 | 247 | 34 | 31 | 7.55 | 1.03 | -0.11 | -0.48 | 190 |
30UHT | 1.13 | 1.08 | 11.3 | 10.8 | 2149 | 27 | 852 | 10.7 | 247 | 223 | 31 | 28 | 7.55 | 1.03 | -0.11 | -0.48 | 190 |
45eh | 1.36 | 1.32 | 13.6 | 13.2 | 2308 | 29 | 1003 | 12.6 | 366 | 342 | 46 | 43 | 7.60 | 1.03 | -0.10 | -0.45 | 200 |
42h | 1.32 | 1.28 | 13.2 | 12.8 | 2388 | 30 | 970 | 12.2 | 342 | 318 | 43 | 40 | 7.60 | 1.03 | -0.10 | -0.45 | 200 |
40 s | 1.28 | 1.25 | 12.8 | 12.5 | 2388 | 30 | 947 | 11.9 | 326 | 302 | 41 | 38 | 7.60 | 1.03 | -0.10 | -0.45 | 200 |
38h | 1.25 | 1.22 | 12.5 | 12.2 | 2388 | 30 | 915 | 11.5 | 310 | 287 | 39 | 36 | 7.60 | 1.03 | -0.10 | -0.45 | 200 |
35 h | 1.22 | 1.17 | 12.2 | 11.7 | 2388 | 30 | 884 | 11.1 | 287 | 263 | 36 | 33 | 7.60 | 1.03 | -0.10 | -0.45 | 200 |
33eh | 1.17 | 1.13 | 11.7 | 11.3 | 2388 | 30 | 860 | 10.8 | 271 | 247 | 34 | 31 | 7.60 | 1.03 | -0.10 | -0.45 | 200 |
30eh | 1.13 | 1.08 | 11.3 | 10.8 | 2388 | 30 | 820 | 10.3 | 247 | 223 | 31 | 28 | 7.60 | 1.03 | -0.10 | -0.45 | 200 |
42EHT | 1.32 | 1.28 | 13.2 | 12.8 | 2467 | 31 | 970 | 12.2 | 342 | 318 | 43 | 40 | 7.60 | 1.03 | -0.10 | -0.45 | 210 |
40EHT | 1.28 | 1.25 | 12.8 | 12.5 | 2547 | 32 | 947 | 11.9 | 326 | 302 | 41 | 38 | 7.60 | 1.03 | -0.10 | -0.45 | 210 |
38EHT | 1.25 | 1.22 | 12.5 | 12.2 | 2547 | 32 | 915 | 11.5 | 310 | 287 | 39 | 36 | 7.60 | 1.03 | -0.10 | -0.45 | 210 |
35EHT | 1.22 | 1.17 | 12.2 | 11.7 | 2547 | 32 | 884 | 11.1 | 287 | 263 | 36 | 33 | 7.60 | 1.03 | -0.10 | -0.45 | 210 |
33EHT | 1.17 | 1.13 | 11.7 | 11.3 | 2547 | 32 | 860 | 10.8 | 271 | 247 | 34 | 31 | 7.60 | 1.03 | -0.10 | -0.45 | 210 |
30EHT | 1.13 | 1.08 | 11.3 | 10.8 | 2547 | 32 | 820 | 10.3 | 247 | 223 | 31 | 28 | 7.60 | 1.03 | -0.10 | -0.45 | 210 |
40Ah | 1.28 | 1.25 | 12.8 | 12.5 | 2706 | 34 | 947 | 11.9 | 326 | 302 | 41 | 38 | 7.60 | 1.03 | -0.10 | -0.45 | 230 |
38Ah | 1.25 | 1.22 | 12.5 | 12.2 | 2786 | 35 | 915 | 11.5 | 310 | 287 | 39 | 36 | 7.60 | 1.03 | -0.10 | -0.45 | 230 |
35Ah | 1.20 | 1.17 | 12.0 | 11.7 | 2786 | 35 | 883 | 11.1 | 287 | 263 | 36 | 33 | 7.60 | 1.03 | -0.10 | -0.45 | 230 |
33Ah | 1.17 | 1.11 | 11.7 | 11.1 | 2786 | 35 | 844 | 10.6 | 271 | 239 | 34 | 31 | 7.60 | 1.03 | -0.10 | -0.45 | 230 |
30Ah | 1.13 | 1.07 | 11.3 | 10.7 | 2786 | 35 | 812 | 10.2 | 247 | 215 | 31 | 27 | 7.60 | 1.03 | -0.10 | -0.45 | 230 |
28Ah | 1.09 | 1.02 | 10.9 | 10.2 | 2786 | 35 | 772 | 9.7 | 231 | 199 | 29 | 25 | 7.60 | 1.03 | -0.10 | -0.45 | 230 |
35. zasedání | 1.22 | 1.17 | 12.2 | 11.7 | 3102 | 39 | 867 | 10.9 | 287 | 263 | 36 | 33 | 7.60 | 1.03 | -0.10 | -0.42 | 250 |
Třicáté třetí zasedání | 1.17 | 1.11 | 11.7 | 11.1 | 3182 | 40 | 851 | 10.7 | 271 | 239 | 34 | 31 | 7.60 | 1.03 | -0.10 | -0.42 | 250 |
30. | 1.13 | 1.08 | 11.3 | 10.8 | 3182 | 40 | 820 | 10.3 | 247 | 223 | 31 | 28 | 7.60 | 1.03 | -0.10 | -0.42 | 250 |
Poznámka: Teplotní koeficient vypočtený podle teplotního rozmezí: HCJ < 20 kOe, ΔT: 20-100 ° C; HCJ ≥20kOe, ΔT: 20-150°C.
Kategorie nátěrů | Zkratky barvy | Barva |
Tloušťka povlaku (μm) |
Srovnání vlastností povrchové ochrany povlaků |
Doporučená teplota (°C) |
Povrchové napětí | ||
---|---|---|---|---|---|---|---|---|
Neutrální zkouška solného spreje | Zkouška vlhkého tepla | Test PCT | ||||||
Ni/Rolling | NI | Jasné stříbro | 10-20 | Hej, hej | Hej, hej | Hej, hej | ≤ 260 | 36 |
Nikl/stojan | NI | Jasné stříbro | 10-20 | Hej, hej | Hej, hej | Hej, hej | ≤ 260 | 36 |
3 + Cr Zn/modrá a bílá Zn/válcování | Zinek | Modrá a bílá | 5-10 | Hej, hej | Re | Re | ≤ 160 | 38 |
3 + Cr Zn/modrá a bílá Zn/rámová úprava | Zinek | Modrá a bílá | 5-10 | Re | Re | Re | ||
3 + Cr barevný zinek/válcování | Barevný zinek | Jasné barvy | 5-10 | Re | Re | Re | ||
3 + Cr barevné pozinkování/rám | Barevný zinek | Jasné barvy | 5-10 | Re | Re | Re | ||
Ni + chemické pokovování niklem | Ni + chemický Ni | Tmavé stříbro | 12-20 | Hej, hej | Hej, hej | Hej, hej | ≤ 200 | 36 |
Ni + elektrolytický niklový rám | Ni + chemický Ni | Tmavé stříbro | 12-20 | Hej, hej | Hej, hej | Hej, hej | ||
Ni + Cr | Ni + Cr | Tmavá černá | 12-20 | Hej, hej | Hej, hej | Hej, hej | ≤ 260 | 36 |
PTFE | PTFE | Tmavě šedá | Re | Re | Re | ≤ 260 | 36 | |
Nikl + černý nikl | Nikl + černý nikl | černá | 12-20 | Hej, hej | Hej, hej | Hej, hej | ||
Ni + Sn | Ni + Sn | Jasné stříbro | 12-20 | Hej, hej | Hej, hej | Hej, hej | – | 36 |
Ni + Ag | Ni + Ag | Silver | 12-20 | Hej, hej | Hej, hej | Hej, hej | – | 36 |
Ni + Au | Ni + Au | Zlato | 10-20 | Hej, hej | Hej, hej | Hej, hej | – | 36 |
Epoxidová pryskyřice | Epoxidová pryskyřice | černá | 10-20 | Hej, hej | Hej, hej | Hej, hej | ≤ 160 | 36 |
Ni/NiCu + epoxid | NiCuNi/NiCu + epoxid | černá | 15-25 | Hej, hej | Hej, hej | Re | ≤ 160 | 36 |
Pasivace/fosfátování | Fosforylace/pasivace | Tmavě šedá | 1-3 | -Sweden | -Sweden | -Sweden | ≤ 240 | 37 |
Nano-potahování | Nano-potahování |
Světle šedá černá |
15-30 | Hej, hej | Hej, hej | Hej, hej. | ≤ 300 | 33 |
Poznámky
1.SST prostředí: 35 ± 2 ° C, 51 tp1TNaCl, pH = 6,5-7,2, sedimentace solného spreje 1,5 ml/h.
2. PCT prostředí: 120 ± 3 °C, 2-2,4 atm, pH destilované vody = 6,7-7,2, 1001 tp1TRH
7,4-7,7 g/cm 3
600-620HV
250-450 MPa
1000-1200 MPa
2-10 kJ/m2
5MPam1/2
150-160GPa
5-6 W.m-1 · k-1
0.44 J.g-1 · k-1
1.25°.mm 2/m
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