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。
2
However, both AC inputs (normal and bypass) can be supplied by the same outgoer (second cable).
但是，这两个交流输入（正常和旁路），可提供由同一。
3
A certain obligated stress must be kept in cable while normal working.