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hafnium是什么意思

hafnium

例句

Chemical form of hafnium is perchlorate or nitrate. 铪的化学形态为过氯酸盐或硝酸盐.
And how is it known that Mars had hafnium - 187 ? 那么是如何知道火星有铪 -187 的呢 ?
This activator is acyl amine - the hafnium activator that ether is a foundation. 该催化剂为酰胺 - 醚为基础的铪催化剂.

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