vertically-aligned set LED, easy and dramatic demonstration of the relationship between the color and wavelength of light, spectral range of each LED can be investigated with spectrometer, or just viewed for comparisons with each other
CNC milling training system, compact, desk-top unit, exposes students to the historical development of CNC, to standard G-code and use of a computer to control the machine, Features Emergency Stop push-button, door around the spindle and material has limit switches
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