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Encyclopedia
工学
[低熔点合金]
释
lead
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化学元素,元素符号Pb,原子序数82,原子量207.2,属周期系ⅣA族。
理学
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释
lead
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化学元素,元素符号Pb,原子序数82,原子量207.2,属周期系ⅣA族。原子量最大的非放射元素。
Astronomy
全称:lead。缩写:Pb
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Chemistry
>无机化学>无机化学基本概念与无机化合物>释义
lead
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Roundtable on the Development and the Role of Museums in Today's World
round-trip gain
round trip time
round trip time, RTT
round-trip transit time
roundup
Roundworm
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Rouruo language
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