is a stapler a simple machine
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is a stapler a simple machine
what type of simple machine is a stapler
what simple machine is a stapler
what kind of simple machine is a stapler
what simple machine is found in a stapler
what simple machines are in a stapler
what simple machines are found in a stapler
is a stapler a simple machine, what type of simple machine is a stapler, what simple machine is a stapler, what kind of simple machine is a stapler, what simple machine is found in a stapler, what simple machines are in a stapler, what simple machines are found in a stapler