Demonstation tubes
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555620 4
Maltese cross tube
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555622
Perrin tube
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555624
Electron deflection tube
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555626
Electron diffraction tube
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555618
Luminescence tube
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555600 4
Tube stand
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555051 8
Adapter for LD demo tubes
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555604 8
Pair of Helmholtz coils
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555629 4
Cross grating, 5000/cm, rotatable
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