铁路；铁道railwayrailroad铁路线railwayline；railroadline铁路网railwaynetwork；railroadnetwork铁道科学railwayscience铁路技术railwaytechnology铁路等级railwayclassification国有铁路nationalrailway；staterailway地方铁路localrailway；regionalrailway私有铁路privaterailway合资铁路jointinvestmentrailway；jointlyownedrailway标准轨铁路standard-gagerailway窄轨铁路narrow-gagerailway米轨铁路meter-gagerailway宽轨铁路broad-gagerailway单线铁路singletrackrailway双线铁路doubletrackrailway多线铁路multipletrackrailway重载铁路heavyhaulrailway高速铁路highspeedrailway电气化铁路；电力铁路electrifiedrailway；electricrailway干线铁路mainlinerailway；trunkrailway市郊铁路suburbanrailway地下铁道；地铁subway；metro；undergroundrailway工业企业铁路industryrailway矿山铁路minerailway轻轨铁路lightrailway；lightrail高架铁路elevatedrailway单轨铁路；独轨铁路monorail；monorailrailway磁浮铁路magneticlevitationrailway；maglev森林铁路forestrailway山区铁路mountainrailway既有铁路existingrailway新建铁路newly-builtrailway改建铁路reconstructedrailway运营铁路railwayinoperation；operation；operatingrailway专用铁路specialpurposerailway干线trunkline；mainline支线branchline铁路专用线railwayspecialline货运专线railwaylineforfreighttraffic；freightspecialline；freighttrafficonlyline客运专线railwaylineforpassengertraffic；passengerspecialline；passengertrafficonlyline客货运混合铁路railwaylineformixedpassengerandfreighttraffic铁路运营长度；运营里程operationlengthofrailway；operatingdistance；revenuelength列车运行图traindiagram铁路建筑长度constructionlengthofrailway区间section区段district轨距railgage；railgauge轮重wheelload轴重axleload最大轴重maximumallowableaxleload限制轴重axleloadlimited限界clearance；gauge限界图clearancediagram铁路建筑限界railwayconstructionclearance；structureclearanceforrailway；railwaystructiongauge基本建筑限界fundamentalconstructionclearance；fundamentalstructuregauge桥梁建筑限界bridgeconstructionclearance；bridgestructuregauge隧道建筑界限tunnelconstructionclearance；tunnelstructuregauge铁路机车车辆限界rollingstockclearanceforrailway；vehiclegauge机车车辆上部限界clearancelimitforupperpartofrollingstock机车车辆下部限界clearancelimitforlowerpartofrollingstock装载限界loadingclearancelimit；loadinggauge阔大货物限界clearancelimitforfreightwithexceptionaldi