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131Three Rivers (Amtrak) — {| Railway line headerThe Three Rivers was a daily Amtrak train running between New York, New York and Chicago, Illinois. It operated via Philadelphia, Pennsylvania, Pittsburgh, Pennsylvania and Akron, Ohio. The Three Rivers replaced the Broadway …
132Three-phase — This article deals with the basic mathematics and principles of three phase electricity. For information on where, how and why three phase is used, see three phase electric power. In electrical engineering, three phase electric power systems have …
