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Filter: Subject of Engineering
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Filter: Subject of agriculture
| Date: | 03 19 1947 |
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| Description: | Diagram showing complete hydraulic system for the O-4 tractor. |
| Date: | 06 16 1959 |
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| Description: | Black and white development sketch for the McCormick-Deering #181 combine. |
| Date: | |
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| Description: | Drawing showing the interior of a central gear mechanism and axles for a Farmall tractor. |
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