QUOTES ABOUT ENGINEERING – 1
خواندن بعدی
In below tables the elements are arranged by atomic number with the year of discovery and the discoverer. The discovery of an element made the discoverer well known and also gave credit to his/her country. Source: Encyclopedia of the Elements, …
تعداد عناصر مهم مورد استفاده در محصولات از 6 مورد در سده 18 میلادی به حدود 45 عنصر در زمان حال، افزایش یافته است. Ref. Achzet and Reller, 2011
Core Material for Steel electrodes
