Defend security and online security of Surge Protection Device (SPD) which related directly whether the railroad signal is correct.

电涌保护器(SPD)的防护安全性和在线安全性，直接关系到铁路信号的正确与否。

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As the cross sector seamless line application, maximum limit reduced the railroad track rail joint, thus the security; the steady movement conditions are provided for the high-speed train.

跨区间无缝线路的应用，最大限度地减少了铁路轨道的钢轨接头，从而为高速列车提供安全、平稳的运行条件。

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According gto Public Security Administration Punishments Law, anyone found posing a safety threat on or near railroad tracks faces an official warning and a maximum fine of 200 yuan ($30).

根据治安管理处罚法，任何人被发现在铁轨上或者附近构成安全威胁的，面临正式警告和最高200元的罚款。

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Russia's Federal Security Service said an improvised explosive device, which unknown bombers placed beneath the railroad bed, caused Friday's derailment.

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To enable the Social Security Administration to pay the correct amount of SSA benefits when the SSA beneficiary has railroad retirement earnings.

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