以下为句子列表：
英文: Permissible bending radius: not less than 6 times of overall diameter for unarmored cable ; not less than 12 times of overall diameter for armored or screened cable ; not less than 6 times of overall diameter for screened flexible cable .
中文: 推荐允许弯曲半径：无铠装层电缆应不小于电缆外径的6倍；有铠装层或屏蔽层结构的电缆应不小于电缆外径的12倍；有屏蔽结构的软电缆应不小于电缆外径的6倍。
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英文: The min curving radius: copper tape screened cable and steel tape armored cable should be at least 12 times the outer diameter. other cable should be at least 6 times the outer diameter.
中文: 电缆最小弯曲半径：铜带屏蔽电缆、钢带铠装电缆不小于外径的12倍，其它电缆不小于电缆外径的6倍。
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英文: With an introduction of cable laying and the environment for the cable, this paper classifies the cable faults recorded on the historic statistics, holds that the armored cable and the on-line detection method shall be adopted, professional evaluation sys
中文: 介绍了上海地铁直流电缆的敷设方式和环境，在统计历史故障的基础上对直流电缆故障进行了分类，提出了在新线建设和改造项目中，尽可能采用带铠装的软电缆；通过在线检测手段，建立专家评估系统，评定绝缘的优劣并预警其劣化的趋势；改进直流电缆敷设质量，改善其运行环境等措施和建议。
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