A Roman tub installation includes a hub and handle assembly, a valve, a sleeve coupled to the valve’s body, a stem adapter coupled to the valve’s stem and to the hub and handle assembly, and a threaded collar coupled to the sleeve. While the quantity of light to be incident on a photodiode is reduced, a signal charge is read out only from the main region of the photodiode. Its conversion rate is high and stable. The air exits the outlets generally normal to the respective surface of the wing, causing a laminar flow to separate from the surfaces downstream of each outlet. A driven rotor is inserted in the short leg. The processing apparatus identifies those image data components that represent the an edge of the object in an image plane, and projects each image edge data component onto the object plane.