“refractory metals”的概念、定义、翻译、参考文献-科学参考

单词	refractory metals
释义	refractory metals Encyclopedia 工学难熔金属释 refractory metals难熔金属熔点高于2400℃的钨（W）、钽（Ta）、钼（Mo）、铌（Nb）、铼（Re）等金属的总称。以难熔金属为基体，添加其他元素的合金称为难熔合金，其使用温度在1200℃以上。
随便看	upper semi continuous upper semi-continuous upper semicontinuous upper semicontinuous decomposition upper semicontinuous equivalence upper semicontinuous function upper semi continuous mapping upper semi-continuous mapping upper semicontinuous mapping upper semicontinuous partition upper semi-lattice upper semi-modular lattice upper semisphere upper series upper set upper side frequency Upper Silesia Coalfield upper singular exponent upper solution upper solution; supersolution upper-stage upper stage liquid rocket engine upper strong derivative upper subsemilattice upper sum

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