“rail expansion joint”的概念、定义、翻译、参考文献-科学参考

单词	rail expansion joint
释义	rail expansion joint Encyclopedia 工学[轨道特征]释 rail expansion joint钢轨伸缩调节器由基本轨、尖轨、扣件系统（垫板、轨撑、扣件）、轨枕等部件组成的轨道设备。
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