Lever - a lever lifts up a wheelie chair to low level from a high level.
Inclined plane - a inclined plane helps people to walk up.
Pulley - a plulley is used to hang up the flag.
Screw - a screw helps things be stabled.
Wheel and axle - wheel and axle helps the wheelie bin move.
Wedge - a wedge is to keep the door open.
These machines are very interesting because they help other people work faster and easier.
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