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化学元素,元素符号Nb,原子序数41,原子量92.9064,属周期系VB族。
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化学元素,元素符号Nb,原子序数41,原子量92.90637(2),属周期系ⅤB族。
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41Nb
{化}
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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
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firefighting tactics
firefighting tactics on chemical industrial fire
firefighting tactics on construction fire
fire fighting technique
firefighting technology and engineering
fire fighting technology for drilling blowout
fire fighting training
firefighting ventilator
fire fight of flammable solid、spontaneous goods
firefly-fish
fire gan
fire gas system
fire hazard
fire hazard degree
fire-heating air pressure
fire heat release rate
fire-hose instability
firehose instability
fire house
fire image recognition detector
fire investigation
fire investigation technology
fire inward collapse
fire lift
firelines
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