"trains" (who is also a user on Twitter) has been ++'ed 0 times and --'ed 1 times by a total of 1 people.
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--'ed by infodiva (and Rockets", Science & Technology Review, June 1998.)
Tweet: Heller, Arnie. "A New Approach for Magnetically Levitating Trains--and Rockets", Science & Technology Review, June 1998.