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单词 rail bond
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rail bond
rail bond n. a short metal cable forming an electric connection between consecutive lengths of rail in a railway or tramway.
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the world > matter > physics > electromagnetic radiation > electricity > transmission of electricity, conduction > conductor used in transport > [noun] > collection point
shoe1891
rail bond1893
slipper1900
collector shoe1940
1893 in K. Hedges Amer. Electr. Street Railways (1894) iii. 22 Each joint of the rails is supplied with two rail bonds of No. 0000 copper wire, each only 12 inches long.
1907 E. Wilson & F. Lydall Electr. Traction I. vi. 107 The ‘Protected’ rail bond is made by fusing terminals of solid copper upon a loop of flattened copper wire.
1992 A. A. Jackson Railway Dict. 230 Rail bond, a device to maintain electrical connection between one rail and another across a rail joint, ensuring conductivity for track circuits.
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