refined ingot pure lead ingot 99.99%
refined pure gold
1/6 ingot ingots aluminum ingots a01refined aluminum alloy
区熔锗锭(zone refined germanium ingot)是指用区熔方法提纯得到
先将铁锭放置熔炉烧制一遍,获得refined iron ingot(精炼铁锭).
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