... 线路网密度 network density 线路中修 intermediate repair of track 线路重复系数 line overlap factor ...
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枕木防腐厂 timber sleeper treating plant 起道修 ;线路中修 track raising repair;track intermediate overhaul 道口路面 crossing road surface ..
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枕木防腐厂 timber sleeper treating plant 起道修 ;线路中修 track raising repair;track intermediate overhaul 道口路面 crossing road surface ..
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