…the chemical element of atomic number 74, a hard steel-grey metal of the transition series. It has a very high melting point (3410°C) and is used to make electric light filaments…
…the chemical element of atomic number 74, a hard steel-grey metal of the transition series. It has a very high melting point (3410°C) and is used to make electric light filaments…
…a very hard grey compound made by reaction of tungsten and carbon at high temperatures, used in making engineering dies, cutting and drilling tools, etc.…
