hk science museum "technology behind magnetic card"

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HK Science Museum "Technology behind Magnetic Card"

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Page 2: HK Science Museum "Technology behind Magnetic Card"

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Page 6: HK Science Museum "Technology behind Magnetic Card"

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Page 7: HK Science Museum "Technology behind Magnetic Card"

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Page 8: HK Science Museum "Technology behind Magnetic Card"

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Page 9: HK Science Museum "Technology behind Magnetic Card"

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