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Collimator: Fixed
summer and fall
This can be used to illustrate the principles of solubility
and aisles
electrode holders
Hoberman Sphere checker-ph-meters Collimator: FixedCombines mathematics, geometry and aesthetics into a magical motion of surprising simplicity, beauty and fun. Its system of polymer links expand and contract almost effortlessly, changing in volume 30 times. A sturdy toy, an object of art, a tool for teaching mathematics and science the Hoberman Sphere's universal appeal and versatility have led its owners to discover uses even its inventor never dreamed of. Children love to wear it on their heads, or
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