US9156321
The adjustments are computed using an algorithm that first determines the current value of a variable having a known relationship to the magnitude of the attraction force produced by a pair of mutually opposing（＊互いに対向）magnets 28 and 36, and then determines the amount by which the tractor vehicle magnet 28 needs to be displaced in order to maintain the magnitude of the attraction force within a preset range.
US20190293473
FIG. 10 is a diagram representing a plan view of a pair of optical fibers encased in respective jackets having mutually opposing（＊互いに対向）longitudinal slots for sideways optical coupling of light (indicated by arrows) from the side-emitting optical fiber to the side-receiving optical fiber.
