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关注：1
2013-05-23 12:21
求翻译：铁路信号设备的安全可靠是什么意思？ 待解决
 悬赏分：1
- 离问题结束还有
铁路信号设备的安全可靠
问题补充： |
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2013-05-23 12:21:38
Safe and reliable railway signaling equipment
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2013-05-23 12:23:18
railway signalling equipment are safe and secure
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2013-05-23 12:24:58
The railway signal equipment security is reliable
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2013-05-23 12:26:38
Railway signal equipment safe and reliable
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2013-05-23 12:28:18
Railway signal equipment safe and reliable
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