Seven Towns sponsors the speed-cubing world championships an evolving showcase for knockoffs to generate publicity for the real deal.
WSJ: One Rubik's Cube, Many Knockoffs, Quintillions of Possibilities
In the early days of speed-cubing the 1980s pioneers first pried open cubes, sanded corners and greased joints with globs of petroleum jelly to allow faster, smoother moves.
Or piggyback on the phenomenon of competitive speed-cubing?
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模块上移
模块下移
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