Rodamientos de bolas
It makes intuitive sense that objects like circles and spheres are round - but what is it about a sphere that makes it round? If you're talking about how effective a shape is at enclosing a...
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One of the all-time favourite discoveries I made at the Nuremberg Toy Fair a few years ago are Hurricane Balls as we call it, which is just two ball bearings, they're half inch ball bearings...
