Archives:Technological Systems Compete at Otis Hydraulic Versus Electric Elevators: Revision history

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5 September 2008

• curprev 20:2220:22, 5 September 2008‎ Mroth talk contribs‎ 1,666 bytes +1,666‎ New page: == Abstract == The hydraulic elevator reached the height of its popularity at the turn of this century, a decade after the appearance of electric elevators. The competition between two el...