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You can get to see the individual scales on a butterfly
central focussing knob
to fit the standard barograph
10cm high plastic model attached to light fabric parachute
Dynamo Torch Kit Magnifiers and Microscopes You can get to seeMake your own kinetic power that is , convert your own hand motion into electrical energy to power a torch or motor. All materials needed are in the kit no batteries required! Part of the Green Science series, 21cmx17 x 6 package. Will suit budding engineers 8+ ready to create some useful tool.
US$ 25.95
US$ 13.00
US$ 28.99
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