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Identify the following simple machines. Write A for lever, B for pulley, Cfor wheel and axle, D for inclined
plane, E for wedge, and F for screw.
6. stairs
7. ax
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1. Knife
2. Wheelbarrow
3. Pliers
4. Windlass
5. Seesaw
8. flagpole
9. doorknob
10. escalator​