单词	home signal
释义	home signal noun : a railroad signal placed at the beginning of a block to indicate whether or not the block is clear compare distant signal Word History First Known Use 1867, in the meaning defined above
随便看	supramastoid supramaxilla supramaxillary supramaxillary nerve suprameatal supramental supramolecular supramundane supranational supranationalism supranationalisms supranationalist supranationalists supranationalities supranationality supranatural supranormal supraocular supraoptic supraorbital supraorbital point supraordinate supraordination supraorganism suprapersonal

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