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simple machine (screw (door, mum's shopping cart, chair, table, frame,…
simple machine
screw
door
mum's shopping cart
chair
table
frame
board
remote controller
computer
wheels and axles
trycikle
bicycle
bike
car
incline plane
ramp
slide
stairs
screw
wedge
knife
cuter
door stoper
pulley
well
marionette clock
elevator
lever
seesaw
scissors