osmiridium alloy锇铱合金
treatment of osmiridium锇铱矿处理
osmiridium pen alloy锇铱笔尖合金
N（名词） a very hard corrosion-resistant white or grey natural alloy of osmium and iridium in variable proportions, often containing smaller amounts of platinum, ruthenium, and rhodium: used esp in pen nibs 铱锇矿 (See also iridosmine)