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Interlock liner provides good insulation against the heat and cold
A simple and effective round Metal Ground Base for use on hard or grass
Reliable ports
Two post chain drive system
Raybox with Accessories (Each) Guitar Accessories Interlock liner provides good insulationThe raybox can be used in a single ray mode without using the plano convex lens. However, with the lens inserted (plane face towards the light source), and using the two slit, three slit or broad slit masks, the emergent light can be made to be divergent, convergent or parallel by adjusting the position of the light source in relation to the lens. These facilities enable the raybox to be used in a wide range of optical experiments with transparent
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