2) busy single track line
繁忙单线铁路
3) busy trunk line
繁忙干线
1.
Discussion on several problems in speed increasing construction of busy trunk lines;
繁忙干线提速改造施工中存在问题的探讨
2.
A discussion of air brake system for heavy-haul express freight trains on busy trunk lines;
繁忙干线开行重载快运列车的制动问题探讨
3.
To meet the challenges, the Ministry of Railways has decided to raise passenger train speeds to 140-160km/h on busy trunk lines and taken vigorous measures.
为了迎接这种挑战,铁道部作出了将繁忙干线旅客列车速度提高到140～160km/h的决定,并积极采取措施。
4) busy main lines
繁忙干线
1.
The current situation of the busy main lines of Chinese railways has shown that there are a lot of disadvantages to have passenger trains and freight trains to run on the same line as it is at present.
介绍了我国主要繁忙干线的运输状况,分析了繁忙干线的各项运营指标,阐述了目前客货列车共线运行的弊端,指出在我国铁路繁忙干线实现客货列车分线运行的时机已经成熟。
5) busy main line
繁忙干线
1.
In combination with national conditions of China and the railway,it is an economic and stable measure to reach 120km/h in existing busy main lines and then increase it to 140km/h.
为提高客车速度，结合我国国情和路情，在既有繁忙干线上，实施先达速（１２０ｋｍ／ｈ）再增速（１４０ｋｍ／ｈ）的方案是经济而稳妥的；并应转变铁路客运经营机制，实现运输方式之间的合理分
6) trunks busy
线路繁忙
补充资料：铁路干线
铁路网中具有重要地位的铁路线。凡能保证全国运输联系，并具有重要政治、经济和国防意义，或达到规定客货运量的铁路，都属于铁路干线。
说明：补充资料仅用于学习参考，请勿用于其它任何用途。
参考词条