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a) Fabrication of a box by step‐wise local heating of the bilayer structure (first graph) at the top arm (second graph), bottom arm (third graph), left arm (fourth graph), and right arm (fifth graph) in that sequence. b) Stepwise folding by electrical activation of a bilayer structure (first graph). Folding at the left arm (second graph), right arm (third graph), and bottom arm (fourth graph) in that sequence. c) Schematic diagram showing the electrical heater design.
