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Empuja y jala con grandes máquinas (Push and Pull with Big Machines)

ISCIENCE JR: EMPUJA JALA GRND MQNS (PUSH PULL BIG MACH)

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<P>How do big construction machines do their job? Young readers will see that they use the force of push and pull to get the work done.</P>

Empuja y jala con grandes máquinas (Push and Pull with Big Machines).css-1p8rvzy{position:absolute;padding-left:8px;}

Empuja y jala con grandes máquinas (Push and Pull with Big Machines)