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117 bytes added
, 20:06, December 9, 2012
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| | [[Safety lamp]] (Davy) | | [[Safety lamp]] (Davy) |
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| | + | '''Communications''' |
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| | + | The postage stamp |
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| | + | The pencil |
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| | + | Christmas cards |
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| | + | Shorthand |
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| | [[Composite ship]] | | [[Composite ship]] |
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| | + | '''Agriculture''' |
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| | + | [[Seed drill]] |
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