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Wind indicator |
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Wireless Telegraphy Demonstration Apparatus after Marconi |
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Wooden and metal frame from a device for illustration of pulleys |
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Wooden cylinder |
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Wooden sphere |
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X-Ray scattering apparatus |
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X-ray tube |
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X-Ray Tube |
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Zenith determination instrument |
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Αεραντλία εμβολοφόρος |
