| 标准 |
JIS |
| 年级 |
300 Series |
| 出生地 |
Shanghai China (Mainland) |
Width Thickness 25 x 25 3 4 5 30 x 30 3 4 5 40 x 40 3 4 5 6 50 x 50 4 5 6 60 x 60 5 6 7 65 x 65 5 6 7 70 x 70 6 7 8 75 x 75 6 7 8 9 80 x 80 7 8 9 10 100 x 100 8 9 10 12 Tolerance: ASTM A276/A 484M, EN 10056/DIN 1028,GB4227 Available size mm