论文部分内容阅读
四、几条主要铁路线的隧道工程概况 前面叙述了三十年来隧道修建概况,现将其中的几条隧道数量比较集中的铁路线列于表4,并以隧道在线路中所占比率的大小按顺序排列。
Four, several major railway line tunnel project overview Earlier describes the 30 years of tunnel construction profile, now the number of the tunnels are concentrated in the number of lines listed in Table 4, and the proportion of the tunnel in the ratio of the size Arranged in order.