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F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
F21V21/00—Supporting, suspending, or attaching arrangements for lighting devices; Hand grips
F21V21/14—Adjustable mountings
F21V21/16—Adjustable mountings using wires or cords
F21V21/18—Adjustable mountings using wires or cords operated by springs
Gleichgewichtsregler fuer Flugzeuge, bei dem das Flugzeug durch Schliessen elektrischer Kontakte in einer durch Einstellung von Hand bestimmbaren Lage gehalten wird