The screw is used to hold materials.
The lever is used for to carry heavy materials
The inclined plane is used for to lift heavy materials.
The wheel axle is used for to move heavy materials.
The lever is used for to lift or cary heavy materials.
The wedge is used for push materials apart.
The pulley is used for building and carying heavy materials very high and to the ground.
These machines are good for buliding and carying heavy materials
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