以下为句子列表:
英文: Abstract: This paper tries to improve and research on the railway signal relay locking,and especially deals with its technicality and safety.
中文: 文摘:文章是关于传统铁道信号继电器联锁方式的计算机改造与研究,从技术性、安全性等方面进行了探讨。
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英文: Railway signal equipment manufacture, marketing.
中文: 铁路信号器材制造、销售。
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