“railway signaling vital relay”的概念、定义、翻译、参考文献-科学参考

单词	railway signaling vital relay
释义	railway signaling vital relay Encyclopedia 工学〔铁路信号设备〕释 railway signaling vital relay铁路信号安全型继电器基于重力恒定原则，接点采用抗熔焊触头材料，实现故障-安全的铁路信号专用继电器。
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