所述T形主绝缘套管基本上由弹性绝缘材料制成， 所述弹性绝缘材料的介电常数在大约5至大约15之间。
The T-shaped main insulating cannula is basically made of elastic insulating materials, and the dielectric constants of the elastic insulating materials are about between 5 and 15.
所述T形主绝缘套管基本上由弹性绝缘材料制成， 所述弹性绝缘材料的介电常数在大约5至大约15之间。
The T-shaped main insulating cannula is basically made of elastic insulating materials, and the dielectric constants of the elastic insulating materials are about between 5 and 15.
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