在巴黎市外的一个实验室底下仓库里,有一个用铂-铱合金做成制成的小圆柱体,这就是全世界衡量重量的标准。
In a laboratory vault outside Paris is a small cylinder of platinum-iridium alloy that serves as the standard for all mass measurements worldwide.
铱锇矿一种矿石,是少量铂、铑及其他金属矿石的铱锇的自然合金,用于制造针头和耐磨尖端。
A mineral that is a natural alloy of osmium and iridium with small inclusions of platinum, rhodium, and other metals, used in needles and wearing points.
国际标准质量千克的原型就是由90%铂和10%铱的合金制成的。
The international prototype kilogram, the primary standard (see weights and measures) for weight, is made of an alloy comprising 90% platinum and 10% iridium.
一般加入少量的铱形成更硬、更强的合金,而又包括了铂的优点。
Small amounts of iridium are commonly added for a harder, stronger alloy that retains platinum's advantages.
目的评估两种不同结构设计的国产铂-铱合金明胶蛋白涂层支架置入兔颈动脉后长期的生物相容性。
Objectives To assess the biocompatibility of the two kinds of different design and wire diameter gelatin coated Platinium Iridium(Pt Ir) stents in rabbit carotid arteries.
主要矿物是自然铂矿、铁铂合金、钌铱锇矿、等轴锇铱矿和铱锇矿。
The trace element Rh exists mainly in native platinum, platinum-iron alloy and Pt-containing osmiridium.
主要矿物是自然铂矿、铁铂合金、钌铱锇矿、等轴锇铱矿和铱锇矿。
The trace element Rh exists mainly in native platinum, platinum-iron alloy and Pt-containing osmiridium.
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