railway monopoly铁路: railway; railroad; rail专利: patent铁路专线: dedicated rail link铁路专用线: plant service railway line, special service railway line; railway siding; special rail对外铁路专线: offsite special purpose rail下载手机词典可随时随地查词查翻译关注微信公众号:chachacidian,回复:铁路专利,即可在微信中查询翻译