Description
with retractable hooks for tandem stacking during physics force experiments
and steel cubes machined to the same 1
14 push buttons
Hundred-thirty-five-ohm 1
Double Concave Glass Lens, 50mm Diameter, 250mm Focal Length, 4mm Thick Subcategory_Inorganic Compounds with retractable hooks for tandemDouble concave glass lens at 50mm diameter and 250mm focal length on a 4mm thick blank, the diverging curvature softening divergence for subtler virtual image reduction in optics work.
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