IFJ_2_2024_david_forrest_Gear with contrast CREDIT DAVID FORREST Ken Norberg May 30, 2024 Views of small sleeve-bearing structure: (a) end, (b) exploded. Photo courtesy of Eric Drexler, Nanosystems Views of small sleeve-bearing structure: (a) end, (b) exploded. Photo courtesy of Eric Drexler, Nanosystems