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Add to basketpaperback. Condition: New. Paperback. Pub Date: 2015-09-01 Pages: 258 Language: Chinese Publisher: China Railway Publishing House. the proper use of computer-based interlocking begins with an overview of basic information and basic operation of computer interlocking. followed by introduction of railway use DS series . JD series. TYJI series. VPI / iLOCK series of computer-based interlocking system architecture. operating system. operating bus services. electrical service repair machine. The proper use of computer inter.