The glass fiber core comes in one of two basic types: multimode fiber for distances up to 10km and single-mode fiber for longer distances.
玻璃纤维芯有两种基本的类型：多模光纤，用于10km以下的距离；单模光纤，用于更长的距离。
The glass fiber core comes in one of two basic types: multimode fiber for distances up to 10km and single-mode fiber for longer distances.
玻璃纤维芯有两种基本的类型：多模光纤，用于10km以下的距离；单模光纤，用于更长的距离。
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