| 摘要 |
319,319. Krupp Akt.-Ges., F. Sept. 20, 1928, [Convention date]. Alloys.-Steel for constructional purposes contains up to about 0.4 per cent of carbon, 0.5 per cent of silicon, over 1.2 up to 2 per cent of manganese, and over 0.4 up to 0.8 per cent of copper, for example 0.2 per cent of carbon, 0.35 per cent of silicon, 1.6 per cent of manganese, and 0.45 per cent of copper. |
