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。
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。
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。
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