�$�Pneumatic tubes, Miniature engines, Cilia-like appendages, Microscopic aircraft, Nerveclusters, Gearboxes, Solenoids, Synthetic muscle fibers, Bioluminescent organisms, Minuscule furnaces, Hydraulic pumps, Fibrous strands, Electronic components, Articulated joints, Microscopic turbines, Cellular structures, Molecular manipulators, Nanotechnology devices, Vascular networks, Mechanical limbs, Biological filaments, Cytoplasmic vesicles, Power transmission lines, Electrical capacitorsc