Date: | |
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Description: | Construction workers sitting atop a steel girder placed by a crane, bolting it together at the corners. |
Date: | |
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Description: | A man uses an oil can to lubricate equipment in a machine shop. |
Date: | |
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Description: | A man cuts a block of wood on a table saw in his workshop. |
Date: | 1950 |
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Description: | Two men operate a machine that uses wires to make equal portions out of a large slab of butter. |
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