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and symmetry
yellow and blue
smooth surface without impurities
Optical Screen
Premium Quality: Multifunction pen holder calendar desk is made of high quality
Sonometer Consumables and symmetryWith double 1m constant wire and plated copper strips and connecting pieces. Fitted with 4 socket terminals and scale graduated 0 to 100cm x 1mm, mounted on wooden board 115x8. 5cm. Complete with knife edge jockey. Premium Quality: Sonometer is made of high grade construction all the way through, excellent build quality and proven reliability across the range. Designed for use in professional laboratories but is an ideal choice for science classrooms
