The way, line, or bed of a railroad on which the track is laid; (also) the track itself.
| 单词 | θ202655 | 
| 释义 | society > travel > rail travel > railway system or organization > 			[noun]		 > track > permanent way (12)		 roadway1813 The way, line, or bed of a railroad on which the track is laid; (also) the track itself. superstructure1830 In literal or physical sense. Railways. The track, sleepers, and other permanent equipment that rests on the roadbed. permanent way1838 The finished roadbed of a railway, together with the track and other permanent equipment, esp. as distinguished from a contractor's temporary… Subcategories:— 			layer beneath foundations			(1)		 — 			level on which ballast is laid			(1)		 — 			space between rails			(6)		 — 			elevation of outer rail on curve			(1)		 | 
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