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(A) Path of the FOSS when it is passed through the actuator's lumens. (B) U-shape of the sensor as loops around the end to return through the other lumen. We assume that the center line of the FOSS lies in a plane—sensor plane. (C) Exploded view of the rigid plastic cap that is attached to the end of the sensor to reinforce the U-shape in the sensor plane. Color images are available online.
