Objective: to investigate how to install an inter-locking nail properly.
前言：目的：探讨如何准确地安装交锁髓内钉锁钉。
The switch controlling unit in full-electronic computer inter-locking is studied in this paper.
本文以全电子计算机联锁系统道岔控制单元为研究对象。
The switch controlling unit in full-electronic computer inter-locking is studied in this paper.
本文以全电子计算机联锁系统道岔控制单元为研究对象。
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