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Terms for subject Communications containing | all forms
ChineseEnglish
轨道断表示器track obstruction indicator
道口断信号level crossing obstruction signal
光帽shading hood
断信号obstruction signal
断信号按钮obstruction signal button
断信号机obstruction signal
断预告信号机distant obstruction signal
断预告信号机approach obstruction signal
隧道断信号tunnel obstruction signal