heavy rare-earth 重稀土则
y heavy rare earth 钇重稀土
heavy rare earth oxide 重稀土氧化物
heavy rare earth metal 重稀土金属
heavy rare earth element 重稀土元素
heavy rare earth chloride 重稀土氯化物
A new type of Y-base heavy rare earth modificator was developed.
研制了一种钇基重稀土变质剂。
Rare earth consists of two categories: one is heavy rare earth, the other one is light rare earth.
稀土有两种，一种是重稀土，一种是轻稀土。
Half the heavy rare earth mines have licenses and the other half are illegal, industry executives said.
工业主管部门表示一半的大型稀土矿有许可证，其他的矿山都属于非法开采。
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