以下为句子列表：
英文: If the optical fiber were brought directly into the cabinet, then it would be unnecessary to provide any data line or telecom protection, since there would not be a metallic pathway for transient voltage to enter into the equipment.
中文: 如果光缆直接进入箱体内，则无须做任何数据线或信号线的保护，因为没有金属导体路径能让电涌电压进入到设备内部。
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英文: Transient voltage suppressors are usually used in mobile communication, computer, handheld/portable product designs.
中文: 瞬变电压消除器通常被使用在移动通讯、计算机、手持/便携式产品上。
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