“betterment and reconstruction of existing railway”的概念、定义、翻译、参考文献-科学参考

单词	betterment and reconstruction of existing railway
释义	betterment and reconstruction of existing railway Encyclopedia 工学铁路选线设计释 betterment and reconstruction of existing railway既有线加强与改建对运营铁路进行技术改造。通过提高既有铁路的输送能力、列车运行速度，降低运输成本，以适应经济社会发展所带来的铁路运量的快速增长以及旅客对运输质量的更高要求。
随便看	secondary active transport of nutrients in plants secondary aerosol secondary air fan secondary air of grate stove secondary allocation method secondary aluminium secondary anemia secondary articulation secondary attack rate，SAR secondary axis secondary battery secondary bifurcation secondary blockage secondary bond secondary breakdown secondary cell secondary cell wall secondary characteristic classes secondary chemical defense secondary circle secondary circuit of electric arc furnace for steelmaking secondary clock secondary cohomology operation secondary coil secondary colony

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