rare-earth mixtures 稀土混合物
rare earth ferroalloys binary mixtures 稀土铁合金二元化合物
mixtures of rare earth chlorides 混合稀土氯化物
Existing lasers use media ranging from crystals doped with rare-earth elements to specific mixtures of gas and even certain sorts of semiconductors.
现有的激光器使用的介质有，掺杂有稀土元素的晶体、特定比例的气体，甚至是某些特定半导体。
Compounds, inorganic or organic, of rare-earth metals, of yttrium or of scandium or of mixtures of these metals.
稀土金属、钇、钪及其混合物的无机或有机化合物。
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