Worried about the U.â S. trade deficit with China? There is one U.â S. product the Chinese can’t get enough of: wooden roller coasters. At least that is the impression one gets from The Gravity Group ...
One of the first “roller-coaster” rides in the U.S. was actually a short coal railway in Pennsylvania that hauled coal downhill between mines and used mules to bring the empty cars back up the hill.
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