Inside and outside cable and circuit laying out, guarding, connection, switch-in, leading out and conductor arrangement of internal signal room on construction site.
工程地点内信号室内外电缆及电线路的敷设、防护、接续、引入、引出、配线等。
For ensuring safety, laying the jointless switch must make an analysis on the strength and the stability.
为了保证安全，铺设无缝道岔应进行强度和稳定性检算。
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