Determination of the torsion angle

How do I determine the torsion angle of a hydraulic hose with 2 floor fittingss?

The torsion angle has to be define, if elbow fittings are used on both ends of a hose line. The simplest wya of doing so is to hold the posterior elbow fitting perpendicular to the roof, the angle can be measured clockwise between the anterior and posterior fitting. End points are in the middle of the sealing surfaces.

Common examples:

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