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150MM DIAMETER F/27 PCX LENS 4000MM FL	150MM DIAMETER F/27 PMN LENS 4000MM FL	INEXPENSIVE DO IT YOURSELF PROJECTOR
45MM DIA BY 75MM DIA INEXPENSIVE BCX LENS	DCX EDUCATIONAL CYLINDER LENS 50MM X 40MM X 75MM FL	INEXPENSIVE DCX 75MM DIA X 175MM FL LENS
INEXPENSIVE DCX 75MM DIA X 250MM FL LENS	OPTICAL DEMONSTRATION CASE	EDUCATIONAL DCX 38MM X 100MM
EDUCATIONAL DCV 38MM X -100MM	EDUCATIONAL OPTICAL DISC DEMONSTRATION ASSEMBLY WITH LIGHT SOURCE	QUALITY COMPACT ZOOM TELESCOPE KIT
EDUCATIONAL DCX 75MM DIA BY 240MM FL	13MM PENTA PRISM
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