在正常的用具有阳性折射指数制作的多个光导纤维中，这种情况会让电缆的有效厚度高于它的实际物理厚度。
In normal optical fibres made from materials with positive refractive indices, this makes the effective thickness of the cable greater than its physical thickness.
在正常的用具有阳性折射指数制作的多个光导纤维中，这种情况会让电缆的有效厚度高于它的实际物理厚度。
In normal optical fibres made from materials with positive refractive indices, this makes the effective thickness of the cable greater than its physical thickness.
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