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Syndicate
| Simple Machines |
Type |
|---|---|
| plow Egypt 1920 BC From a tomb at Beni Hasan | Image |
| Ancient Plough | Image |
| First Wheeled Vehicles | Image |
| man-and-lever.jpg | Image |
| Photographophone Sound-Record Film | Image |
| Measure Horse Collar | Image |
| USS Leyte and USS Roberts refueling on the seas | Image |
| Grain Cradle | Image |
| Screw 3 forms | Image |
| man-and-lever.jpg | Image |