Tool with a single insulation must be reliably grounded.
单绝缘工具应有可靠的接地系统。
Specialized brain cells called oligodendrocytes wrap up to 150 layers of this insulation around a single axon.
一种称为的寡树突胶质细胞的专门脑细胞，它在单个轴突（紫色）的周围包裹的绝缘层可达150层。
The economical model of pipeline insulation is divided into single layer structure and double layer structure types.
保温管道的经济模型分为单层结构和双层结构两种。
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