ประเภท: ท่อนิกเกิล

When most people hear the word “nickel,” they commonly associate it with the nickel coin worth five cents in America. ที่กล่าว, nickel is also known as a silvery-white metal you could find in the earth’s crust, typically in hydrothermal veins and in surface deposits thanks to erosion and the weathering of rocks. If you… อ่านเพิ่มเติม »