1. Cupel: a porous cup often made of bone ash used in assaying to separate precious metals from base elements such as lead.
灰皿:一种多孔杯,通常用骨类制成,在检验中把贵重金属从低劣物质如铝中分离出来。

来自互联网

2. Cupel: a porous cup often made of bone ash used in assaying to separate precious metals from base elements such as lead.
灰皿:一种多孔杯,通常用骨类制成,在检验中把贵重金属从低劣物质如铝中分离出来。

来自互联网