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A classic steam locomotive train chugs powerfully across a tall wooden bridge, blowing thick smoke into the sky.
Meet Barnaby, the bravest steam engine in the valley! Today, Barnaby is on a very important mission. He is carrying a load of shiny black coal in his tender, which is the small car right behind his cabin. Did you know that steam engines like Barnaby use coal and water to make power? The hot fire turns water into steam, and that steam pushes his giant metal wheels to make them turn round and round.
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A modern police car patrols a city street with its roof lights clearly visible.
A sturdy construction steamroller flattens the road surface with its large heavy drum.
A classic vintage biplane flies through the sky surrounded by fluffy clouds.
A heavy-duty mobile construction crane truck is parked on a dirt site, using its long lattice boom and hook to lift a large concrete pipe.
A massive heavy-duty bucket-wheel excavator sits parked at a construction quarry, showing off its giant digging wheel and sturdy tank treads.
