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单词 edge-rail
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> as lemmas

edge-rail
edge-rail n. (see quots.).
ΚΠ
1874 E. H. Knight Pract. Dict. Mech. Edge-rail (Railroad). a. One form of rail-road-rail, which bears the rolling stock on its edge. b. A rail placed by the side of the main rail at a switch to prevent the train from running off the track when the direction is changed.
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