| 摘要 |
<p>A metal is zone-melted directly by induction in a water-cooled silver crucible. Steel, hafnium, molybdenum, tungsten, and tantalum may be zone-refined. Small pieces of uranium, zirconium, titanium, nickel, iron, aluminium, gadolinium, praseodymium, dysprosium, and yttrium may be formed into ingots.</p> |
