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Pocket-book of mechanics and engineering (1864)
Nystrom, John W. (John William), 1824-1885 · Philadelphia, J.B. Lippincott · leaf 105
93. Triangle a =- i&A,3 a -2\A-c c* - a* - frV 25 )! … 94. Quadrangle, a = 4^(a + 5).Mechanical engineering · Engineering
Internet Archive · Library of Congress · Public Domain Mark 1.0. Free to use for anything.
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