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5 April 2013

  • 15:0415:04, 5 April 2013 diff hist +2,318 N Chebyshev linkage→‎See also: The Peaucellier(-Lipkin) mechanism is an EIGHT bar mechanism, not a 7 bar mechanism. The "ground" link is one of the bars. That's why we talk of "Four bar" mechanism, and not "three bar".